M12 x 40mm 先端とがり六角穴付き止めねじ | 合金鋼 (100 / パック)

The hex socket drive made tightening these into a tight spot on my milling machine clamp much easier than I expected. All 100 screws had clean threads and consistent cone points, so no returns.

These set screws are perfect for locking down components on my milling machine, the hex drive makes them easy to torque up in tight spots. The alloy steel feels much tougher than the standard hardware store stuff, and all 100 screws came in the package without any burrs or defects.

The cone point digs in properly so these hold firm even in a tight spot, and the hex socket lets me get a good bite with an Allen key without stripping. Pack of 100 for the price is solid, and the alloy steel feels tough enough for what I'm doing.