A
Anonymous
Mar 21, 2026
Rating: 5/5
Great value
Essential for any repair kit. The organizer box keeps everything neat on the workbench.
Description
This is a high-strength, headless set screw designed for securing components by tightening against a shaft or bore without protruding above the surface. Manufactured from alloy steel with a Grade 12.9 hardness rating, it features a flat point tip to maximize contact area and prevent rotation under heavy load. The fastener includes a hexagonal socket drive for precise torque application using an Allen key and is available in metric thread sizes ranging from M3 to M12 to suit various mechanical assemblies. Ensure the mating surface is clean and use a calibrated tool to apply the correct tightening torque for optimal holding power.
Reviews
Attributes
| Brand | - |
| Category | Industrial Small Parts / Connectors and Fasteners |
| Origin | - |
| Material | Alloy Steel |
| Strength Grade | 12.9 |
| Drive Type | Hex Socket |
| Head Style | Flat Head |
| Thread Standard | Metric |
| Surface Finish | Black Oxide |
| Hardness | HRC 39-44 |
| Package Count | 100 Pieces |
| RoHS Compliant | Yes |
| Ideal Application | Electronics Assembly |
5 reviews
A
Anonymous
Mar 21, 2026
Rating: 5/5
Perfect for device housing
Used these to close up laptop cases and secure internal components. The 12.9 grade holds tight without stripping.
A
Anonymous
Mar 18, 2026
Rating: 5/5
High quality steel
No stripping during tight assembly. The hex socket is deep enough for good key engagement.
A
Anonymous
Mar 15, 2026
Rating: 4/5
Good assortment
Quality is high, though I wish there were more M3 sizes included in the mix for phone repairs.
A
Anonymous
Mar 05, 2026
Rating: 5/5
Strong hold
Great for securing heatsinks and motors in my 3D printer projects. Very reliable steel quality.
5 FAQ
Q: What is the head angle?
A: These feature a standard 90 degree countersunk flat head design.
Q: Can I use these on plastic?
A: Yes, but please torque carefully to avoid cracking the plastic housing.
Q: Do you have M2 size?
A: This specific set starts at M3. Please check our micro screw category for M2.
Q: Is the box stackable?
A: Yes, the plastic organizer case is designed for tool storage stacking.
Q: Are these suitable for PCB mounting?
A: Yes, they are commonly used for securing standoffs and components in electronics.
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