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Stainless Steel Nuts & Bolts
Product Overview
Stainless Steel Nuts & Bolts from R V Metal Corporation are supplied in a wide range of grades to match real-world service conditions—general corrosion, chlorides, heat, wear, and high-strength fastening. Our stock covers economical 200-series options (J7, J4, 201, 202) for cost-sensitive fabrication, standard 300-series austenitic grades (301, 302, 304, 304L, 304H, 305, 308, 309, 309S, 310, 310S) for excellent formability and corrosion resistance, and molybdenum-bearing 316/317 families (316, 316L, 316H, 316Ti, 317, 317L) for improved pitting resistance in marine and chemical environments. For elevated-temperature service, we offer heat-resistant grades such as 309/309S and 310/310S, while stabilized grades like 321/321H and 347/347H help reduce sensitization risk during welding and high-temperature exposure. We also supply 400-series ferritic and martensitic grades (409L, 410, 410S, 420, 429, 430, 430Ti, 439, 441, 444) where oxidation resistance, magnetic properties, or higher hardness are required. For aggressive chloride environments and higher strength-to-weight fastening, Duplex S31803 delivers strong resistance to stress corrosion cracking with superior mechanical strength versus standard austenitic steels. Available in multiple standards and finishes, our stainless steel nuts, bolts, studs, washers, and threaded rods are suitable for OEMs, fabricators, EPC contractors, marine, oil & gas, chemical processing, HVAC, and general engineering applications.
Technical Specifications
| Parameter | Specification / Range (Stainless Steel Nuts & Bolts) |
|---|---|
| Product Forms | Hex Bolts, Hex Nuts, Stud Bolts, Threaded Rods, Washers, Socket Head Cap Screws, Set Screws, Anchor Bolts (as per requirement) |
| Grades Covered | J7, J4, 201, 202, 301, 302, 304, 304L, 304H, 305, 308, 309, 309S, 310, 310S, 316, 316L, 316H, 316Ti, 317, 317L, 321, 321H, 347, 347H, 409L, 410, 410S, 420, 429, 430, 430Ti, 439, 441, 444, S31803 (Duplex) |
| Material Families | Austenitic (200/300 series), Ferritic (400 series), Martensitic (400 series hardenable), Duplex (S31803) |
| Size Range (Metric) | M3 to M100 (common supply: M6–M36; larger sizes on request) |
| Size Range (Imperial) | 1/8" to 4" (common supply: 1/4"–1-1/2"; larger sizes on request) |
| Length Range (Bolts / Studs) | 6 mm to 1000 mm (threaded rods up to 3000 mm; custom lengths available) |
| Thread Standards | Metric Coarse/Fine (ISO), UNC, UNF, UNEF, BSW/BSF, BA (on request) |
| Thread Class / Tolerance | Metric: 6g/6H (typical) • Unified: 2A/2B (typical) • Higher classes available on request |
| Standards (Fasteners) | ISO, DIN, ASTM/ASME, BS, IS, JIS (as applicable to item and grade) |
| Common ISO / DIN References | ISO 4014 / 4017 (Hex Bolts), ISO 4032 (Hex Nuts), ISO 4762 (Socket Head Cap Screws), DIN equivalents available |
| ASTM / ASME References (Typical) | ASTM A193 (Stud Bolts), ASTM A194 (Nuts), ASTM F593/F594 (SS bolts/nuts), ASME B18 series (dimensions) |
| Strength Class / Condition | As per grade and standard: Solution Annealed (Austenitic), Cold Worked (A2/A4 style), Quenched & Tempered (Martensitic where applicable), Duplex solution treated |
| Heat Treatment | Solution annealing / stress relief (as applicable) • Martensitic grades can be heat treated for higher hardness |
| Surface Finish | Plain, Bright, Pickled & Passivated, Shot Blasted, Electro-polished (on request) |
| Coatings (If Required) | No coating typical for SS • PTFE / Xylan / other anti-galling or chemical-resistant coatings on request |
| Galling Control (Optional) | Lubrication, silver plating (special), PTFE coating, and grade pairing guidance available for anti-seize applications |
| Dimensional Inspection | Thread gauges, pitch verification, go/no-go gauges, head markings, length, across flats, concentricity (as applicable) |
| Quality & Testing | Chemical analysis, mechanical tests (tensile/proof load), hardness (where applicable), PMI (on request), corrosion tests (on request) |
| Certification | MTC / Test Certificate as per EN 10204 3.1 (typical) • Third-party inspection on request |
| Marking | Grade/standard marking as applicable (A2/A4, ASTM markings, heat no., manufacturer mark) depending on standard and size |
| Packaging | Bulk bags, cartons, wooden boxes, palletized export packing; heat/lot traceability labels available |
| Supply Condition | Stock supply and cut-to-length / made-to-order as per drawings, samples, or specifications |
| Typical Applications | Marine, chemical processing, food & pharma, HVAC, oil & gas, heat exchangers, fabrication, general engineering, OEM assemblies |
Chemical Composition
| Stainless Steel Family | Grades Covered | Carbon (C) % | Chromium (Cr) % | Nickel (Ni) % | Molybdenum (Mo) % | Other Key Elements |
|---|---|---|---|---|---|---|
| Austenitic – 200 Series | J7, J4, 201, 202 | ≤ 0.15 | 16.0 – 18.0 | 3.5 – 5.5 | — | Mn: 5.5 – 7.5%, N: ≤ 0.25% |
| Austenitic – 300 Series (Cr–Ni) | 301, 302, 304, 304L, 304H, 305, 308 | ≤ 0.08 (L: ≤ 0.03 / H: 0.04–0.10) | 17.0 – 19.0 | 8.0 – 11.0 | — | Mn ≤ 2.0%, Si ≤ 1.0% |
| Austenitic – High Temperature Grades | 309, 309S, 310, 310S | ≤ 0.08 (S: ≤ 0.03) | 22.0 – 26.0 | 12.0 – 22.0 | — | Excellent oxidation resistance |
| Austenitic – Mo Bearing Grades | 316, 316L, 316H, 316Ti, 317, 317L | ≤ 0.08 (L: ≤ 0.03) | 16.0 – 18.5 | 10.0 – 15.0 | 2.0 – 4.0 | Ti (316Ti): ≤ 0.7% |
| Austenitic – Stabilized Grades | 321, 321H, 347, 347H | ≤ 0.08 (H up to 0.10) | 17.0 – 19.0 | 9.0 – 13.0 | — | Ti (321) / Nb (347) stabilization |
| Ferritic Stainless Steel | 409L, 429, 430, 430Ti, 439, 441, 444 | ≤ 0.08 | 11.0 – 18.0 | ≤ 0.75 | ≤ 2.0 (444) | Ti/Nb stabilized grades available |
| Martensitic Stainless Steel | 410, 410S, 420 | 0.08 – 0.40 | 11.5 – 14.0 | ≤ 0.75 | — | Heat treatable for high strength |
| Duplex Stainless Steel | S31803 (2205) | ≤ 0.03 | 21.0 – 23.0 | 4.5 – 6.5 | 2.5 – 3.5 | N: 0.08 – 0.20% |
UNS Codes & Grades
| Stainless Steel Family | Grade Designation | UNS Code | Equivalent / Notes |
|---|---|---|---|
| Commercial (Non-UNS) | J7 | — | Indian market grade, approx. AISI 201 type chemistry |
| J4 | — | Low-nickel / Mn-rich variant of 200 series (non-standard) | |
| Austenitic – 200 Series | 201 | S20100 | Low-nickel austenitic stainless steel |
| 202 | S20200 | Improved corrosion resistance vs 201 | |
| Austenitic – 300 Series | 301 | S30100 | High work-hardening rate |
| 302 | S30200 | General purpose fastener grade | |
| 304 | S30400 | Most common SS fastener grade | |
| 304L | S30403 | Low carbon for welding | |
| 304H | S30409 | High-carbon for high temperature | |
| 305 | S30500 | Lower work-hardening | |
| 308 | S30800 | Welding consumable & fasteners | |
| 309 | S30900 | High temperature resistance | |
| 309S | S30908 | Low carbon variant | |
| 310 | S31000 | High Cr-Ni heat resistant grade | |
| 310S | S31008 | Oxidation resistant fasteners | |
| 316 | S31600 | Mo-bearing corrosion resistant | |
| 316L | S31603 | Low carbon marine grade | |
| 316H | S31609 | High temperature applications | |
| 316Ti | S31635 | Titanium stabilized | |
| 317 | S31700 | Higher Mo content | |
| 317L | S31703 | Low carbon variant | |
| 321 | S32100 | Ti stabilized austenitic grade | |
| 321H | S32109 | High-carbon stabilized | |
| 347 | S34700 | Nb stabilized stainless steel | |
| 347H | S34709 | High-temperature fasteners | |
| Ferritic / Martensitic | 409L | S40903 | Automotive & exhaust fasteners |
| 410 | S41000 | Hardenable martensitic steel | |
| 410S | S41008 | Low carbon variant | |
| 420 | S42000 | High hardness fasteners | |
| 429 | S42900 | Ferritic stainless steel | |
| 430 | S43000 | General ferritic SS | |
| 430Ti | S43932 | Titanium stabilized ferritic | |
| 439 | S43900 | Improved weldability | |
| 441 | S44100 | Nb stabilized ferritic | |
| 444 | S44400 | High corrosion resistant ferritic | |
| Duplex Stainless Steel | S31803 (2205) | S31803 | High strength & chloride resistance |
Mechanical, Physical & Fabrication Properties
| Stainless Steel Family | Applicable Grades | Typical Tensile Strength (MPa) | Yield Strength (MPa) | Hardness (HB / HRC) | Density (g/cm³) | Fabrication & Machinability |
|---|---|---|---|---|---|---|
| Commercial / 200 Series (Austenitic) | J7, J4, 201, 202 | 520 – 750 | 275 – 450 | HB 150 – 210 | ≈ 7.85 – 7.90 | Good formability, moderate corrosion resistance, non-magnetic |
| Austenitic – Standard 300 Series | 301, 302, 304, 304L, 305, 308 | 520 – 860 | 205 – 450 | HB 150 – 215 | ≈ 7.93 | Excellent cold forming, excellent corrosion resistance |
| Austenitic – High Temperature Grades | 304H, 309, 309S, 310, 310S | 550 – 900 | 240 – 480 | HB 160 – 220 | ≈ 7.90 – 8.00 | Excellent oxidation resistance, good creep strength |
| Austenitic – Mo Bearing | 316, 316L, 316H, 316Ti, 317, 317L | 520 – 860 | 205 – 460 | HB 150 – 215 | ≈ 7.95 – 8.00 | Excellent marine & chemical corrosion resistance |
| Austenitic – Stabilized Grades | 321, 321H, 347, 347H | 515 – 850 | 205 – 450 | HB 150 – 210 | ≈ 7.90 – 7.95 | Excellent weldability, carbide precipitation resistant |
| Ferritic Stainless Steel | 409L, 429, 430, 430Ti, 439, 441, 444 | 380 – 600 | 205 – 380 | HB 130 – 200 | ≈ 7.70 – 7.75 | Good oxidation resistance, magnetic, limited cold formability |
| Martensitic Stainless Steel | 410, 410S, 420 | 650 – 1000 | 450 – 850 | HRC 20 – 50 (heat treated) | ≈ 7.70 – 7.75 | Heat-treatable, high strength, lower corrosion resistance |
| Duplex Stainless Steel | S31803 (2205) | 620 – 900 | 450 – 550 | HB 230 – 290 | ≈ 7.80 | High strength, excellent chloride stress corrosion resistance |
Common Names & International Identifiers
| Grade / Code (Commonly Used) | Family | Common / Trade Names (Market) | UNS | EN / Euronorm (Typical) | EN Material No. (W.Nr.) | JIS (Typical) | Notes (Fastener Context) |
|---|---|---|---|---|---|---|---|
| J4 | Austenitic (200-type) | J4 Stainless (India market), 200-Series fastener grade | — | Closest: EN 1.4372 / 1.4371 (varies by producer) | — | — | Trade designation; chemistry varies—use MTC for exact ID |
| J7 | Austenitic (200-type) | J7 Stainless (India market), 200-Series fastener grade | — | Closest: EN 1.4372 / 1.4371 (varies by producer) | — | — | Trade designation; chemistry varies—use MTC for exact ID |
| 201 | Austenitic | 201 Stainless, “200 Series SS” | S20100 / S20153 (variant dependent) | EN 10088 (approx): X12CrMnNiN17-7-5 | — | SUS201 | Cost-effective; moderate corrosion resistance |
| 202 | Austenitic | 202 Stainless, “200 Series SS” | S20200 | EN 10088 (approx): X12CrMnNiN18-8-5 | — | SUS202 | Common in general fasteners; verify Ni/Mn on MTC |
| 301 | Austenitic | 301 Stainless, Spring Stainless (cold worked) | S30100 | X10CrNi18-8 | 1.4310 | SUS301 | High work-hardening; used for clips/spring parts |
| 302 | Austenitic | 302 Stainless | S30200 | X10CrNi18-8 (often treated near 304 family) | 1.4310 (commonly referenced family) | SUS302 | General purpose; many markets use 304 instead |
| 304 | Austenitic | 18/8 Stainless, A2 Stainless (fastener term) | S30400 | X5CrNi18-10 | 1.4301 | SUS304 | Most common stainless fastener material |
| 304L | Austenitic | Low Carbon 304, 18/8L | S30403 | X2CrNi18-9 | 1.4307 | SUS304L | Better weldability; reduced carbide precipitation risk |
| 304H | Austenitic | High Carbon 304 (high-temp service) | S30409 | X6CrNi18-10 | 1.4948 | — | High-temperature strength; not typical for standard fasteners |
| 305 | Austenitic | 305 Stainless (deep draw) | S30500 | X5CrNi18-10 (commonly aligned family) | 1.4303 | SUS305 | Used where low work-hardening is desired |
| 308 | Austenitic | 308 Stainless (often welding grade term) | S30800 | — | — | — | More common as welding consumable classification |
| 309 | Austenitic (heat-resistant) | 309 Stainless | S30900 | X15CrNi23-13 | 1.4828 | SUS309 | Heat resistance; oxidation resistance |
| 309S | Austenitic (heat-resistant) | 309S Stainless | S30908 | X8CrNi23-13 | 1.4833 | SUS309S | Low carbon variant for improved weldability |
| 310 | Austenitic (heat-resistant) | 310 Stainless | S31000 | X15CrNi25-20 | 1.4841 | SUS310 | High temperature oxidation resistance |
| 310S | Austenitic (heat-resistant) | 310S Stainless | S31008 | X8CrNi25-21 | 1.4845 | SUS310S | Low carbon variant for weldability |
| 316 | Austenitic (Mo-bearing) | Marine Stainless, A4 Stainless (fastener term) | S31600 | X5CrNiMo17-12-2 | 1.4401 | SUS316 | Best general-purpose corrosion resistance for fasteners |
| 316L | Austenitic (Mo-bearing) | Marine Stainless (Low Carbon), A4L | S31603 | X2CrNiMo17-12-2 | 1.4404 | SUS316L | Preferred for welded assemblies / chloride exposure |
| 316H | Austenitic (Mo-bearing) | 316H Stainless (high-temp) | S31609 | X6CrNiMo17-12-2 | 1.4919 | — | High-temperature service; not common in regular fasteners |
| 316Ti | Austenitic (stabilized) | Ti Stabilized 316 | S31635 | X6CrNiMoTi17-12-2 | 1.4571 | SUS316Ti (market usage varies) | Improved intergranular corrosion resistance after welding |
| 317 | Austenitic (Mo-bearing) | 317 Stainless (higher Mo) | S31700 | X5CrNiMo19-13-3 | 1.4449 (commonly referenced) | SUS317 | Higher pitting resistance than 316 in some environments |
| 317L | Austenitic (Mo-bearing) | 317L Stainless | S31703 | X2CrNiMo18-14-3 | 1.4438 (commonly referenced) | SUS317L | Low carbon; improved weldability |
| 321 | Austenitic (stabilized) | Ti Stabilized 304 | S32100 | X6CrNiTi18-10 | 1.4541 | SUS321 | Good for elevated temperature & welded service |
| 321H | Austenitic (stabilized) | 321H Stainless (high carbon) | S32109 | X6CrNiTi18-10 (H variant) | 1.4878 (commonly referenced) | — | High-temperature creep strength |
| 347 | Austenitic (stabilized) | Nb Stabilized 304 | S34700 | X6CrNiNb18-10 | 1.4550 | SUS347 | Welded high-temperature service |
| 347H | Austenitic (stabilized) | 347H Stainless (high carbon) | S34709 | High C variant (EN family) | — | — | Used in high-temp pressure equipment |
| 409L | Ferritic | 409L Stainless, Exhaust Grade | S40900 / S40910 | X2CrTi12 (typical) | 1.4512 / 1.4509 (varies) | SUS409L | Good oxidation resistance; limited corrosion resistance |
| 410 | Martensitic | 410 Stainless, Hardenable Stainless | S41000 | X12Cr13 | 1.4006 | SUS410 | Heat-treatable; used for high strength fasteners |
| 410S | Ferritic / low-carbon martensitic type | 410S Stainless | S41008 | X6Cr13 | 1.4000 | SUS410S | Better weldability than 410; not for high hardness |
| 420 | Martensitic | 420 Stainless, Cutlery Grade (high hardness) | S42000 | X20Cr13 | 1.4021 | SUS420J1/J2 (variants) | High hardness; corrosion resistance lower than 304/316 |
| 429 | Ferritic | 429 Stainless | S42900 | X8Cr17 (approx) | — | — | Ferritic corrosion/oxidation resistance, magnetic |
| 430 | Ferritic | 430 Stainless, 17% Chromium Stainless | S43000 | X6Cr17 | 1.4016 | SUS430 | Common decorative ferritic; magnetic |
| 430Ti | Ferritic (stabilized) | Stabilized 430 (Ti) | — | — | — | — | Market term; use MTC for exact standard ID |
| 439 | Ferritic | 439 Stainless (stabilized ferritic) | S43900 | X2CrTi17 | 1.4510 | SUS439 | Improved corrosion vs 430; good weldability |
| 441 | Ferritic | 441 Stainless (stabilized ferritic) | S44100 | X2CrTiNb18 | 1.4509 (commonly referenced family) | — | High-temp oxidation + improved weldability |
| 444 | Ferritic | 444 Stainless (Mo-bearing ferritic) | S44400 | X2CrMoTi18-2 | 1.4521 | — | Excellent chloride corrosion resistance for ferritic family |
| S31803 (Duplex 2205) | Duplex | Duplex 2205, Marine Duplex | S31803 (also common: S32205) | X2CrNiMoN22-5-3 | 1.4462 | — | High strength + excellent chloride SCC resistance |
Standards & International Equivalents
| Stainless Steel Grade | Material Family | ASTM / ASME (Fasteners) | ISO / DIN / EN | EN Material No. (W.Nr.) | JIS | Typical Fastener Class / Notes |
|---|---|---|---|---|---|---|
| J4 | Austenitic (200-type) | ASTM A193 / A194 (market practice) | DIN/EN – Trade grade (no fixed EN) | — | — | Indian trade grade; verify chemistry via MTC |
| J7 | Austenitic (200-type) | ASTM A193 / A194 (market practice) | DIN/EN – Trade grade (no fixed EN) | — | — | Cost-driven fastener grade; not a formal standard |
| 201 | Austenitic | ASTM A193 / A194 (limited use) | EN 10088 | — | SUS201 | Moderate corrosion resistance |
| 202 | Austenitic | ASTM A193 / A194 (limited use) | EN 10088 | — | SUS202 | Widely used in commercial fasteners |
| 301 | Austenitic | ASTM A193 / A194 | EN 10088 | 1.4310 | SUS301 | High work-hardening; spring applications |
| 302 | Austenitic | ASTM A193 / A194 | EN 10088 | 1.4310 (family) | SUS302 | Often substituted by 304 |
| 304 | Austenitic | ASTM A193 B8 / ASTM A194 8 | EN ISO 3506 | 1.4301 | SUS304 | A2-70 / A2-80 fasteners |
| 304L | Austenitic | ASTM A193 B8 / A194 8 | EN ISO 3506 | 1.4307 | SUS304L | Low carbon; welding-friendly |
| 304H | Austenitic | ASTM A193 B8H | EN 10269 | 1.4948 | — | High-temperature bolting |
| 305 | Austenitic | ASTM A193 / A194 | EN 10088 | 1.4303 | SUS305 | Low work-hardening rate |
| 308 | Austenitic | ASTM A193 (rare for fasteners) | EN 10088 | — | — | Mainly referenced in welding grades |
| 309 / 309S | Austenitic (Heat Resistant) | ASTM A193 B8 / B8S | EN 10088 | 1.4828 / 1.4833 | SUS309 / 309S | High-temperature fasteners |
| 310 / 310S | Austenitic (Heat Resistant) | ASTM A193 B8 / B8S | EN 10088 | 1.4841 / 1.4845 | SUS310 / 310S | Extreme heat resistance |
| 316 | Austenitic (Mo-bearing) | ASTM A193 B8M / ASTM A194 8M | EN ISO 3506 | 1.4401 | SUS316 | A4-70 / A4-80 marine fasteners |
| 316L | Austenitic (Mo-bearing) | ASTM A193 B8M | EN ISO 3506 | 1.4404 | SUS316L | Preferred for corrosive environments |
| 316H | Austenitic | ASTM A193 B8MH | EN 10269 | 1.4919 | — | High-temperature bolting |
| 316Ti | Austenitic (Stabilized) | ASTM A193 B8M (Ti stabilized) | EN 10088 | 1.4571 | SUS316Ti | Improved resistance after welding |
| 317 / 317L | Austenitic | ASTM A193 B8M | EN 10088 | 1.4449 / 1.4438 | SUS317 / 317L | Higher Mo for aggressive media |
| 321 / 321H | Austenitic (Stabilized) | ASTM A193 B8 / B8H | EN 10088 / EN 10269 | 1.4541 / 1.4878 | SUS321 | High-temperature welded systems |
| 347 / 347H | Austenitic (Stabilized) | ASTM A193 B8 / B8H | EN 10088 / EN 10269 | 1.4550 | SUS347 | Pressure & heat service fasteners |
| 409L | Ferritic | ASTM A193 / A194 | EN 10088 | 1.4512 / 1.4509 | SUS409L | Exhaust & mild corrosion areas |
| 410 / 410S | Martensitic / Ferritic | ASTM A193 B6 / A194 6 | EN 10088 | 1.4006 / 1.4000 | SUS410 / 410S | Heat-treatable fasteners |
| 420 | Martensitic | ASTM A193 | EN 10088 | 1.4021 | SUS420 | High hardness; wear resistance |
| 429 / 430 / 430Ti | Ferritic | ASTM A193 / A194 | EN 10088 | 1.4016 | SUS430 | Magnetic; moderate corrosion resistance |
| 439 / 441 | Ferritic (Stabilized) | ASTM A193 | EN 10088 | 1.4510 / 1.4509 | SUS439 | Improved weldability & oxidation resistance |
| 444 | Ferritic (Mo-bearing) | ASTM A193 | EN 10088 | 1.4521 | — | High chloride resistance (ferritic) |
| S31803 (Duplex 2205) | Duplex | ASTM A193 B8M Class 2 / ASTM A194 | EN ISO 3506 / EN 10088 | 1.4462 | — | High strength + chloride SCC resistance |
Applications
| Stainless Steel Grade | Material Family | Typical Applications of Nuts & Bolts |
|---|---|---|
| J4 | Austenitic (200 Series – Trade) | Furniture fittings, light fabrication, decorative assemblies, non-critical structural joints |
| J7 | Austenitic (200 Series – Trade) | General-purpose fasteners, electrical panels, low-corrosion indoor applications |
| 201 | Austenitic | Automotive trims, appliances, light engineering fasteners, architectural interiors |
| 202 | Austenitic | Construction fasteners, scaffolding, storage racks, transportation equipment |
| 301 / 302 | Austenitic | Spring-loaded assemblies, vibration-resistant joints, fasteners requiring work hardening |
| 304 | Austenitic | General engineering, food processing equipment, chemical plants, architectural structures |
| 304L | Austenitic (Low Carbon) | Welded structures, pressure vessels, pipelines, pharmaceutical equipment |
| 304H | Austenitic (High Carbon) | High-temperature bolting, heat exchangers, refinery and power plant equipment |
| 305 | Austenitic | Cold-heading fasteners, precision screws, deep-drawn components |
| 308 | Austenitic | Specialized fastening in welded assemblies (limited structural usage) |
| 309 / 309S | Austenitic (Heat Resistant) | Furnace equipment, thermal processing units, high-temperature flanges and joints |
| 310 / 310S | Austenitic (High Heat Resistant) | Extreme-temperature fasteners, kilns, incinerators, petrochemical furnaces |
| 316 | Austenitic (Mo Bearing) | Marine structures, offshore platforms, chemical processing, food & dairy plants |
| 316L | Austenitic (Low Carbon, Mo) | Coastal installations, desalination plants, pharmaceutical & biotech equipment |
| 316H | Austenitic | High-temperature pressure systems, refinery bolting, power generation equipment |
| 316Ti | Austenitic (Stabilized) | Welded high-temperature systems, exhaust manifolds, heat exchangers |
| 317 / 317L | Austenitic (High Mo) | Chemical reactors, acid-handling equipment, aggressive corrosion environments |
| 321 / 321H | Austenitic (Titanium Stabilized) | Aerospace fasteners, exhaust systems, thermal cycling applications |
| 347 / 347H | Austenitic (Niobium Stabilized) | Pressure vessels, refinery units, high-stress welded joints |
| 409L | Ferritic | Automotive exhaust systems, heat shields, low-corrosion fasteners |
| 410 / 410S | Martensitic / Ferritic | Pumps, valves, shafts, moderately corrosive mechanical assemblies |
| 420 | Martensitic | High-strength fasteners, wear-resistant components, tooling assemblies |
| 429 / 430 / 430Ti | Ferritic | Household appliances, automotive trims, indoor structural fasteners |
| 439 / 441 | Ferritic (Stabilized) | Automotive exhaust fasteners, thermal cycling applications, welded assemblies |
| 444 | Ferritic (Mo Bearing) | Water heaters, coastal installations, chloride-rich environments |
| S31803 (Duplex 2205) | Duplex Stainless Steel | Offshore oil & gas platforms, marine fasteners, chemical plants, high-load structures |
Common Stainless Steel Nuts & Bolts Dimensions Chart
The following charts are a practical reference for selecting stainless steel nuts & bolts in common grades such as J7/J4, 201/202, 304/304L/304H, 316/316L/316Ti, 321/347, 409L/410/420/430/444 and Duplex S31803 (2205). Dimensions are aligned with widely used ISO hex fastener geometry (hex bolt / hex nut). Weights are theoretical and intended for estimation, costing, and logistics planning—actual weights can vary by standard, tolerance, thread form, under-head radius, chamfer, and manufacturing method.
Grade-wise Density Correction Factors (for Weight Estimation)
| Grade Family | Typical Density (g/cm³) | Weight Factor vs 304/316 | How to Use |
|---|---|---|---|
| Austenitic (J7/J4, 201/202, 304/316 family) | 7.93 | 1.000 (Baseline) | Use listed weights as-is |
| Ferritic / Martensitic (409L, 410, 420, 430, 444, etc.) | 7.70 | 0.971 | Weight ≈ (304/316 weight) × 0.971 |
| Duplex (S31803 / 2205) | 7.80 | 0.984 | Weight ≈ (304/316 weight) × 0.984 |
A) Hex Nut Dimensions & Theoretical Weight (Baseline: 304/316)
| Thread | Coarse Pitch (mm) | Across Flats “s” (mm) | Nut Height “m” (mm) | Theoretical Weight (kg / 100 pcs) – 304/316 |
|---|---|---|---|---|
| M6 | 1.00 | 10 | 5.0 | 1.57 |
| M8 | 1.25 | 13 | 6.5 | 3.82 |
| M10 | 1.50 | 17 | 8.0 | 7.99 |
| M12 | 1.75 | 19 | 10.0 | 13.23 |
| M16 | 2.00 | 24 | 13.0 | 27.30 |
| M20 | 2.50 | 30 | 16.0 | 49.06 |
| M24 | 3.00 | 36 | 19.0 | 79.24 |
B) Hex Bolt (Fully Threaded) — Common Lengths & Theoretical Weight (Baseline: 304/316)
| Size | Length L (mm) | Across Flats “s” (mm) | Head Height “k” (mm) | Weight (kg / 100 pcs) – 304/316 |
|---|---|---|---|---|
| M6 | 20 | 10 | 4.0 | 3.23 |
| M6 | 30 | 10 | 4.0 | 4.35 |
| M6 | 40 | 10 | 4.0 | 5.47 |
| M6 | 50 | 10 | 4.0 | 6.59 |
| M6 | 60 | 10 | 4.0 | 7.71 |
| M8 | 20 | 13 | 5.3 | 7.64 |
| M8 | 30 | 13 | 5.3 | 9.63 |
| M8 | 40 | 13 | 5.3 | 11.61 |
| M8 | 50 | 13 | 5.3 | 13.60 |
| M8 | 60 | 13 | 5.3 | 15.58 |
| M10 | 20 | 17 | 6.4 | 14.32 |
| M10 | 30 | 17 | 6.4 | 17.43 |
| M10 | 40 | 17 | 6.4 | 20.54 |
| M10 | 50 | 17 | 6.4 | 23.65 |
| M10 | 60 | 17 | 6.4 | 26.76 |
| M12 | 20 | 19 | 7.5 | 21.57 |
| M12 | 30 | 19 | 7.5 | 26.06 |
| M12 | 40 | 19 | 7.5 | 30.56 |
| M12 | 50 | 19 | 7.5 | 35.05 |
| M12 | 60 | 19 | 7.5 | 39.54 |
| M16 | 20 | 24 | 10.0 | 42.55 |
| M16 | 30 | 24 | 10.0 | 58.47 |
| M16 | 40 | 24 | 10.0 | 74.39 |
| M16 | 50 | 24 | 10.0 | 90.31 |
| M16 | 60 | 24 | 10.0 | 106.23 |
| M20 | 20 | 30 | 12.5 | 73.83 |
| M20 | 30 | 30 | 12.5 | 98.76 |
| M20 | 40 | 30 | 12.5 | 123.69 |
| M20 | 50 | 30 | 12.5 | 148.62 |
| M20 | 60 | 30 | 12.5 | 173.55 |
C) Threaded Rod / Stud Weight per Meter (Quick Estimation Baseline: 304/316)
| Nominal Size | Dia (mm) | Weight (kg/m) – 304/316 | Ferritic/Martensitic (×0.971) | Duplex S31803 (×0.984) |
|---|---|---|---|---|
| M6 | 6 | 0.224 | 0.218 | 0.220 |
| M8 | 8 | 0.399 | 0.388 | 0.393 |
| M10 | 10 | 0.622 | 0.604 | 0.612 |
| M12 | 12 | 0.896 | 0.871 | 0.882 |
| M16 | 16 | 1.593 | 1.547 | 1.567 |
| M20 | 20 | 2.488 | 2.415 | 2.447 |
| M24 | 24 | 3.584 | 3.480 | 3.525 |
Formula reference:
Bolt/Stud mass is estimated from geometry and material density. For round sections:
Weight (kg) = Volume (mm³) × Density (g/cm³) × 10−6.
For grade changes, multiply the baseline 304/316 weight by the correction factor table above.
Values shown are theoretical; confirm against project/standard requirements for critical applications.
Metric Hex Nut Dimensions (mm)
| Diameter and Thread Pitch | S | M | Dw | C | |||
|---|---|---|---|---|---|---|---|
| Width Across Flats | Thickness | Bearing Face Diameter | Washer Face Thickness | ||||
| Max. | Min. | Max. | Min. | Min. | Max. | Min. | |
| M12 X 1.75 | 21.00 | 20.16 | 12.3 | 11.9 | 19.2 | 0.8 | 0.4 |
| M14 X 2 | 24.00 | 23.16 | 14.3 | 13.6 | 22.0 | 0.8 | 0.4 |
| M16 X 2 | 27.00 | 26.16 | 17.1 | 16.4 | 24.9 | 0.8 | 0.4 |
| M18 X 2.5 | 30.00 | 29.16 | 18.9 | 18.1 | 27.7 | 0.8 | 0.4 |
| M20 X 2.5 | 34.00 | 33.00 | 20.7 | 19.4 | 31.4 | 0.8 | 0.4 |
| M22 X 2.5 | 36.00 | 35.00 | 23.6 | 22.3 | 33.3 | 0.8 | 0.4 |
| M24 X 3 | 41.00 | 40.00 | 24.2 | 22.9 | 38.0 | 0.8 | 0.4 |
| M27 X 3 | 46.00 | 45.00 | 27.5 | 26.3 | 42.8 | 0.8 | 0.4 |
| M30 X 3.5 | 50.00 | 49.00 | 30.7 | 29.1 | 45.6 | 0.8 | 0.4 |
| M33 X 3.5 | 55.00 | 53.80 | 33.6 | 32.0 | 50.6 | 0.8 | 0.4 |
| M36 X 4 | 60.00 | 58.80 | 36.6 | 35.0 | 55.9 | 0.8 | 0.4 |
| M39 X 4 | 65.00 | 63.80 | 39.0 | 37.5 | 60.2 | 0.8 | 0.4 |
| M42 X 4.5 | 70.00 | 67.90 | 42.0 | 40.4 | 64.5 | 1.0 | 0.5 |
| M45 X 4.5 | 75.00 | 72.80 | 45.0 | 43.4 | 69.1 | 1.0 | 0.5 |
| M48 X 5 | 80.00 | 77.60 | 48.0 | 46.4 | 73.7 | 1.0 | 0.5 |
| M52 X 5 | 85.00 | 82.40 | 52.0 | 50.3 | 78.2 | 1.0 | 0.5 |
| M56 X 5.5 | 90.00 | 87.20 | 56.0 | 54.1 | 82.8 | 1.0 | 0.5 |
| M64 X 6 | 100.00 | 96.80 | 64.0 | 62.1 | 92.0 | 1.0 | 0.5 |
