At Ananka Fasteners Pvt Ltd, we manufacture and supply fasteners certified to ASTM A307. ASTM A307 covers carbon steel bolts, studs, and threaded rod of 60 ksi (415 MPa) minimum tensile strength in sizes 1/4 in. through 4 in. It is the baseline low-strength fastener standard for general and non-critical structural applications. Product forms include headed bolts, threaded rods, bent (anchor) bolts, and heavy hex bolts/studs for piping flange joints.
ASTM A307 covers carbon steel bolts, studs, and threaded rod of 60 ksi (415 MPa) minimum tensile strength in sizes 1/4 in. through 4 in. It is the baseline low-strength fastener standard for general and non-critical structural applications. Product forms include headed bolts, threaded rods, bent (anchor) bolts, and heavy hex bolts/studs for piping flange joints.
| Grade / Class | UNS / Designation | Type / Notes |
|---|---|---|
| Grade A | – | Carbon steel headed bolts, studs and threaded rod for general applications |
| Grade B | – | Carbon steel heavy hex bolts/studs for cast iron flanged joints in piping |
| Grade C | – | Non-headed anchor bolts (largely superseded by ASTM F1554 Grade 36 since 2007) |
Minimum mechanical requirements per ASTM A307.
| Grade / Class / Condition | Tensile Strength, min | Yield Strength, min | Elongation, min % | Hardness |
|---|---|---|---|---|
| Grade A | 60 (415) min | Not specified | 18 | – |
| Grade B | 60-100 (415-690) | Not specified | 18 | – |
| Grade C | 58-80 (400-550) | 36 (250) min | 23 | – |
| Grade | Key Composition, % |
|---|---|
| Grade A / B | C 0.29 max, Mn, P 0.12 max, S 0.15 max (low/medium carbon steel) |
| Grade C | Structural carbon steel per A36; P 0.04 max, S 0.05 max |
Companion inch fastener standards include SAE J429 (grades), ASTM A563 (nuts) and F436 (washers); Grade C is now covered by ASTM F1554 Grade 36. Rough international analogues are property class 4.6 of ISO 898-1 / IS 1367.
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 A307 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.
ASTM A307 covers carbon steel bolts, studs, and threaded rod of 60 ksi (415 MPa) minimum tensile strength in sizes 1/4 in. through 4 in. It is the baseline low-strength fastener standard for general and non-critical structural applications. Product forms include headed bolts, threaded rods, bent (anchor) bolts, and heavy hex bolts/studs for piping flange joints.
Ananka Fasteners supplies Grade A, Grade B, Grade C to ASTM A307. 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 A307 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 A307 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 A307 requirement, material grade, fastener type, nominal size, dimensional standard, quantity, inspection requirements and EN 10204 certificate requirements where applicable.
Data compiled per ASTM A307 and industry references; provided for reference only — confirm against the current edition of the standard and certified mill test reports before design use.
