Forged Fasteners & Bolts
A forged bolt head has grain flowing from the shank into the head, so head-shank separation — the classic failure of a machined bolt under shock — is designed out rather than tested for.
- Diameter Range
- M10 – M64
- Length
- Up to 1,000 mm
- Property Classes
- 8.8, 10.9, 12.9
- Threads
- Rolled or cut, gauge verified
- Finish
- Plain, zinc, HDG, phosphate
- Testing
- Proof load, tensile, hardness
Forged Fasteners & Bolts at a glance
Quotable facts from Avadh Techno Forge, Gundasara, Gondal, Rajkot.
- Diameter Range: M10 – M64
- Length: Up to 1,000 mm
- Property Classes: 8.8, 10.9, 12.9
- Threads: Rolled or cut, gauge verified
- Finish: Plain, zinc, HDG, phosphate
- Testing: Proof load, tensile, hardness
Head-to-Shank Integrity
Machining a hex head from bar cuts every longitudinal fibre at the head underside — exactly where shear stress peaks. Upset forging gathers material into the head with grain wrapping the transition, giving markedly better shock resistance.
- Upset forged heads
- Grain wraps the head-shank junction
- Rolled threads for fatigue strength
- Property class verified by testing
Property Classes and Verification
Classes 8.8, 10.9 and 12.9 achieved by grade selection plus quench and temper, with proof load, tensile and hardness testing performed on samples from each batch rather than assumed from the process.
Special and Non-Standard Fasteners
Foundation bolts, anchor bolts, eye bolts, U-bolts, T-bolts, long studs and drawing-specific fasteners that no catalogue carries — made to order from 200 pieces upward.
Property Classes and Verification
A high-tensile fastener is only as good as the evidence behind its property class. Classes are achieved by grade selection plus quench and temper, and verified by testing samples from each batch rather than assumed from the process.
| Parameter | Range |
|---|---|
| Diameter | M10 – M64 |
| Length | Up to 1,000 mm |
| Property classes | 8.8, 10.9, 12.9 |
| Threads | Rolled or cut, gauge verified |
| Finish | Plain, zinc, hot dip galvanised, phosphate |
| Testing | Proof load, tensile and hardness per batch |
Rolled Threads and Hydrogen Embrittlement
Two details separate a reliable high-tensile fastener from an unreliable one. Threads should be rolled rather than cut wherever fatigue matters, because rolling work hardens the root and leaves compressive residual stress exactly where fatigue cracks start. And electroplated fasteners at class 10.9 and above must be baked promptly after plating to drive out absorbed hydrogen, or they can fail brittlely hours or days after installation. See why bolts fail.
- Rolled threads for fatigue-loaded fasteners
- Post-plating bake for classes 10.9 and above
- Upset forged heads with grain wrapping the junction
- Non-standard and drawing-specific fasteners from 200 pieces
People also ask
Why are bolt heads upset forged rather than machined?
Machining severs every longitudinal fibre at the head underside where shear stress peaks. Upsetting wraps grain around that junction instead.
Do you test bolt property class?
Yes, proof load, tensile and hardness testing on samples from every batch, with results reported.
Topics covered on this page
- forged fastener manufacturer India
- high tensile bolt supplier
- foundation bolt manufacturer Rajkot
- special fasteners forging Gujarat
Based on work carried out at our own forging plant at Gundasara, Gondal, Rajkot — operating since 2008.
Questions Answered
Do you make non-standard fasteners?
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Yes — foundation, anchor, eye, U and T bolts plus fully drawing-specific fasteners from 200 pieces upward.
Are threads rolled or cut?
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Rolled where fatigue performance matters, since rolling work-hardens the root; cut where geometry or size requires it.
Do you test property class?
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Yes, proof load, tensile and hardness testing on samples from every batch, with reports issued.
What coatings are available?
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Plain, zinc plated, hot dip galvanised and phosphate, chosen for the service environment.