Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Screws
Origin	-
Material	Alloy Steel
Hardness Grade	12.9 (High Tensile)
Point Type	Flat Point
Drive Type	Hex Socket (Allen)
Thread Standard	Metric Coarse
Available Sizes	M3, M4, M5, M6, M8, M10, M12
Surface Finish	Black Oxide
Head Style	Headless (Grub Screw)
Application	Machine Assembly & Fixation
Package Contents	Assorted Kit with Storage Case

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Great assortment for the workshop

Having all these sizes in one box saves so much time. The storage case keeps them organized. I've used the M5 and M6 sizes frequently for motor mounts with great results.

Anonymous

Mar 24, 2026

Rating: 4/5

Good value, slight finish variation

Overall a solid set. The threads are clean and cut easily. I noticed minor variations in the black oxide coating on a few of the M4 screws, but it doesn't affect performance.

Anonymous

Mar 17, 2026

Rating: 5/5

Stripped no issues during installation

The internal hex drive is machined precisely. I had no issues with Allen keys slipping or stripping the heads, which is common with cheaper brands. Highly recommended.

Anonymous

Mar 09, 2026

Rating: 5/5

True 12.9 hardness

As a mechanical engineer, I verify my fasteners. These tests confirmed they meet the 12.9 hardness specification. Reliable for critical applications where failure is not an option.

Anonymous

Mar 05, 2026

Rating: 5/5

Excellent quality for heavy machinery

These 12.9 grade screws are incredibly strong. I used the M8 size to secure a gear on my lathe, and they held up perfectly under high torque. The hex socket didn't strip even when tightened firmly.

Anonymous

Mar 01, 2026

Rating: 5/5

Perfect fit for my CNC projects

I needed precise headless screws for a custom CNC build. The flat point provides great stability without damaging the shaft surface too aggressively. The assortment kit is very convenient.

5 FAQ

Q: What is the maximum torque rating for the M8 screw?

A: Torque values depend on lubrication and specific application conditions. However, for a dry M8 Grade 12.9 screw, a typical tightening torque is approximately 35-40 Nm. Please consult engineering tables for your specific safety factors.

Q: Does the kit include an Allen key?

A: No, this kit contains only the set screws and the storage case. You will need to use your own metric hex key set for installation.

Q: Can these be used on hardened steel shafts?

A: Yes, the flat point design is specifically intended for use against hardened surfaces to prevent rotation while minimizing surface damage compared to cup points.

Q: Are these screws suitable for outdoor use?

A: While the steel is high-tensile, the black oxide finish offers limited corrosion resistance. For prolonged outdoor exposure, we recommend applying a rust-inhibiting lubricant or choosing stainless steel variants.

Q: What is the thread pitch for the M6 size?

A: The M6 screws in this set feature a standard coarse thread pitch of 1.0mm, adhering to ISO metric standards.

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