Attributes

Brand	-
Category	Industrial Small Parts / Connectors and Fasteners
Origin	-
Material	Alloy Steel
Strength Grade	12.9
Surface Finish	Black Oxide
Thread Standard	ISO Metric Coarse
Head Style	Cylindrical Cap
Drive Type	Hex Socket
Thread Coverage	Full Thread
Hardness	39-44 HRC
Min Tensile Strength	1200 MPa
Package Quantity	100 Pieces

5 reviews

Anonymous

Apr 11, 2026

Rating: 5/5

Precise threading

Threads engage smoothly without cross-threading. Very satisfied with the quality and finish.

Anonymous

Apr 06, 2026

Rating: 5/5

Professional grade

We use these in our workshop daily. Consistent quality across batches and good value.

Anonymous

Apr 01, 2026

Rating: 4/5

Good but strict torque

Great screws but be careful not to overtighten as high strength steel can be brittle.

Anonymous

Mar 06, 2026

Rating: 5/5

Fast delivery

Arrived well organized in a plastic case. Exactly what I needed for my project.

Anonymous

Feb 04, 2026

Rating: 5/5

Excellent for machinery

Used these for assembling a motor mount. The strength is genuine 12.9 grade and they hold torque well.

5 FAQ

Q: Are they rust proof for outdoor use?

A: Black oxide provides limited corrosion resistance, not suitable for wet environments.

Q: Is this material stainless steel?

A: No, this is alloy steel with a black oxide coating for strength.

Q: Do you sell matching nuts separately?

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

Q: What hex key size is needed for M5?

A: M5 socket cap screws typically require a 4mm hex key.

Q: Is the head height standard ISO?

A: Yes, dimensions follow ISO 4762 standards for socket cap screws.

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