At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM F837/F837M. Standard specification for stainless steel socket head cap screws (SHCS), inch (F837) and metric (F837M) series, 0.060-1.500 in (M1.6-M36). Classifies by alloy group – Group 1 & 2 austenitic (cold worked), Group 5 martensitic (heat treated) – and condition (AF annealed, CW/CW1 cold worked, HT heat treated).
Standard specification for stainless steel socket head cap screws (SHCS), inch (F837) and metric (F837M) series, 0.060-1.500 in (M1.6-M36). Classifies by alloy group – Group 1 & 2 austenitic (cold worked), Group 5 martensitic (heat treated) – and condition (AF annealed, CW/CW1 cold worked, HT heat treated).
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Group 1 | 304/305/384 (S30400 etc.) | Austenitic; conditions AF/CW/CW1 |
| Group 2 | 316/316L (S31600/S31603) | Austenitic Mo-bearing; AF/CW/CW1 |
| Group 5 | 410 (S41000) | Martensitic, heat treated (HT) |
Minimum mechanical requirements per ASTM F837/F837M.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Group 1&2 AF (annealed, 0.060-1.500 in) | 85 max (586 max) | 55 max (379 max) | – | 210 HV max |
| Group 1&2 CW (0.060-0.750 in) | 80 (552) | 40 (276) | – | 150 HV min |
| Group 1&2 CW1 (0.060-0.750 in) | 102 (703) | 65 (448) | – | 220 HV min |
| Group 5 HT (0.060-0.190 in) | 180 (1241) | 120 (827) | – | 350-423 HV |
| Group 5 HT (0.250-1.500 in) | 160 (1103) | 120 (827) | – | 350-423 HV |
| Grade | Key Composition, % |
|---|---|
| Group 1 (304) | C 0.08 max, Cr 17-19, Ni 8-11 |
| Group 2 (316) | C 0.08 max, Cr 16-18.5, Ni 10-14, Mo 2-3 |
| Group 5 (410) | C 0.09-0.15, Cr 11.5-13.5 |
Stainless counterpart to ASTM A574 (alloy SHCS); dimensions per ASME B18.3/B18.3.1M. Austenitic grades parallel ISO 3506 A2/A4.
For the official ASTM International standards catalogue, see the ASTM International standards listing. This external reference is provided for standards identification; the purchaser should verify the current edition applicable to the order.
We supply ASTM F837/F837M fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
For technical documentation and quotations, buyers can also review the Ananka Fasteners manufacturing and supply range or contact the team through the fastener enquiry and technical support page.
Ananka Fasteners supplies every lot with full material traceability and third-party testing on request.
Standard specification for stainless steel socket head cap screws (SHCS), inch (F837) and metric (F837M) series, 0.060-1.500 in (M1.6-M36). Classifies by alloy group – Group 1 & 2 austenitic (cold worked), Group 5 martensitic (heat treated) – and condition (AF annealed, CW/CW1 cold worked, HT heat treated).
Ananka Fasteners supplies Group 1, Group 2, Group 5 to ASTM F837/F837M. See the Grades / Classes Covered table above for full details of each grade.
Minimum tensile strength, yield strength, elongation and hardness requirements vary by grade — see the Mechanical Properties table above for the complete breakdown.
We supply ASTM F837/F837M fasteners — bolts, screws, studs, nuts and washers as applicable — for energy, petrochemical, marine, structural and general engineering service, in a full range of sizes and finishes.
Yes. For a quotation, provide the required fastener type, grade, nominal size, dimensional standard, quantity and any inspection or certificate requirements.
Need a fastener released to ASTM F837/F837M for an industrial project? Send the required fastener type, grade, size, quantity and certification requirements to Ananka Fasteners. Our team can review the requirement and provide technical and commercial information for standard or custom configurations.
Recommended RFQ details: ASTM F837/F837M requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM F837/F837M and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
