Attributes

Brand	-
Category	Industrial Small Parts / Connectors and Fasteners
Origin	-
Material	Alloy Steel
Strength Grade	12.9
Surface Finish	Black Oxide
Standard	DIN 931
Thread Type	Metric Coarse
Head Style	Hexagon
Shank Type	Half-Threaded
Size Range	M6 to M24
Tensile Strength	1220 MPa
Packaging	Bulk Box

5 reviews

Anonymous

Apr 12, 2026

Rating: 5/5

Fast Delivery

Needed M14 urgently. Arrived in two days and worked great.

Anonymous

Apr 05, 2026

Rating: 5/5

Industrial Quality

Using in production line assembly. No issues so far with load bearing.

Anonymous

Mar 21, 2026

Rating: 5/5

True to Spec

Measured threads with calipers. Perfect DIN fit for my machinery.

Anonymous

Feb 20, 2026

Rating: 4/5

Good but brittle

Very hard steel, be careful not to overtighten or they may snap.

Anonymous

Feb 01, 2026

Rating: 5/5

Excellent Strength

Used for turbo manifold. Held torque perfectly without stretching.

5 FAQ

Q: Are washers included with the bolts?

A: No, these are sold as bolts only. Washers are available separately.

Q: Can I use these on aluminum components?

A: Yes, but we recommend using anti-seize compound to prevent galling.

Q: Do you offer volume discounts?

A: Yes, please contact our sales team for orders over 500 units.

Q: Is the black coating thick?

A: No, it is a thin oxide layer primarily for appearance and mild protection.

Q: What wrench size is needed for M12?

A: Typically 18mm for DIN 931 M12 hex heads.

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