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Home / Connectors and Fasteners / Full Thread External Hex Screw, Grade 12.9 Alloy Steel High-Strength Bolt M5-M20
Connectors and Fasteners

Attributes

Brand -
Category Industrial Small Parts / Connectors and Fasteners
Origin -
Material Alloy Steel
Strength Class 12.9
Thread Coverage Fully Threaded
Head Style Hex Head
Surface Treatment Black Oxide
Min Tensile Strength 1220 MPa
Min Yield Strength 1100 MPa
Drive Type External Hex
Standard Compliance ISO 898-1
Available Sizes M5, M6, M8, M10, M12, M14, M16, M20

5 reviews

A

Anonymous

Apr 07, 2026

Rating: 5/5

Highly Durable

Excellent alloy steel quality. Will definitely order more for future projects.

A

Anonymous

Apr 06, 2026

Rating: 5/5

Precise Threading

Threads matched perfectly with my nuts. No cross-threading issues during assembly.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Top Notch Quality

These bolts handled high stress without any deformation. Very satisfied with the tensile strength.

A

Anonymous

Feb 24, 2026

Rating: 4/5

Solid Hardware

Great bolts for the price. One bolt had a minor finish imperfection but functionally sound.

A

Anonymous

Feb 18, 2026

Rating: 5/5

Perfect for Machinery

Used these on a hydraulic press frame. They hold torque very well.

5 FAQ

Q: What is the hardness rating?

A: These Grade 12.9 bolts typically have a hardness between 39 and 44 HRC.

Q: Can these be used outdoors?

A: They have a basic black oxide coating. For harsh outdoor environments, additional corrosion protection is advised.

Q: Is certification available for batch testing?

A: Mill certificates can be provided for large industrial orders upon request before shipment.

Q: Do you offer metric washers separately?

A: Yes, please search our store for hardened steel washers compatible with Grade 12.9 fasteners.

Q: Are these sold individually or in packs?

A: Pricing varies by size, but they are generally sold in packs of 10, 50, or 100 units.

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