Attributes

Brand	-
Category	Industrial Small Parts / Connectors and Fasteners
Origin	-
Material	Alloy Steel
Strength Grade	12.9
Head Style	Socket Head Cap
Drive Type	Internal Hex
Thread Size Range	M3, M4, M5, M6, M8, M10, M12, M16
Surface Finish	Black Oxide
Manufacturing Standard	DIN 912 / ISO 4762
Tensile Strength	1220 MPa
Hardness	HRC 39-44
Package Type	Plastic Storage Case

5 reviews

Anonymous

Apr 21, 2026

Rating: 5/5

Strong and Reliable

Used these for rebuilding my engine. No issues with stripping under high torque.

Anonymous

Apr 18, 2026

Rating: 5/5

Perfect Fit

Threads are precise and match standard nuts perfectly. Very satisfied with the quality.

Anonymous

Mar 26, 2026

Rating: 5/5

Great Value

Much cheaper than local hardware store for the same 12.9 grade specification.

Anonymous

Mar 23, 2026

Rating: 5/5

Professional Grade

Exactly what is needed for high tension applications in machinery. Highly recommend.

Anonymous

Mar 04, 2026

Rating: 4/5

Good Quality

Great bolts, but delivery took a bit longer than expected. Product itself is excellent.

5 FAQ

Q: Is there a warranty?

A: We offer a 30-day return policy for unused items in original packaging.

Q: Can I use these on aluminum?

A: Yes, but ensure proper torque to avoid stripping the softer aluminum threads.

Q: Do you sell matching nuts?

A: Yes, please check our store for compatible 12.9 grade hex nuts.

Q: What hex key size for M6?

A: Typically requires a 5mm hex key for M6 size according to standard specifications.

Q: Are these rust resistant?

A: They have black oxide coating but are not stainless steel. Use oil for outdoor protection.

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