At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM F879/F879M. Standard specification for stainless steel socket button head and flat countersunk head cap screws, inch (F879, 0.060-0.625 in) and metric (F879M, M1.6-M16) series. Austenitic (Group 1/2) grades supplied in conditions AF (annealed), CW (cold worked) and CW1 (high-strength cold worked).
Standard specification for stainless steel socket button head and flat countersunk head cap screws, inch (F879, 0.060-0.625 in) and metric (F879M, M1.6-M16) series. Austenitic (Group 1/2) grades supplied in conditions AF (annealed), CW (cold worked) and CW1 (high-strength cold worked).
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Group 1 | 304/304L/305/384 (S30400/S30403) | Austenitic; AF/CW/CW1 |
| Group 2 | 316/316L (S31600/S31603) | Austenitic Mo-bearing; AF/CW/CW1 |
Minimum mechanical requirements per ASTM F879/F879M.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| AF (annealed) | 85 max (586 max) | – | – | 210 HV max |
| CW (cold worked) | 80 (552) | – | – | 150 HV min |
| CW1 (high-strength CW) | 102 (703) | – | – | 220 HV min |
| 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 |
Stainless companion to ASTM F835 (alloy button/countersunk cap screws); head styles per ASME B18.3. 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 F879/F879M 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 button head and flat countersunk head cap screws, inch (F879, 0.060-0.625 in) and metric (F879M, M1.6-M16) series. Austenitic (Group 1/2) grades supplied in conditions AF (annealed), CW (cold worked) and CW1 (high-strength cold worked).
Ananka Fasteners supplies Group 1, Group 2 to ASTM F879/F879M. 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 F879/F879M 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 F879/F879M 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 F879/F879M requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM F879/F879M and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
