M4-0.7 X 40mm 소켓 캡 나사 | 육각 소켓 드라이브 | 전체 나사산 | 316 스테인리스 스틸 (400 / 팩)

The hex drive on these M4 screws is crisp and doesn't strip, and the 316 stainless feels solid for jig work. I used a full pack on a marine tooling project and every one seated perfectly. Exactly what I needed for precision assemblies.

Finally found a bulk pack of 316 stainless that actually resists corrosion in my marine jig builds—these M4s have a solid hex socket that doesn't strip under torque. Four hundred pieces means I won't run out for a while.

Used these on a custom tooling fixture and the 316 stainless finish is exactly what I needed for a slightly corrosive environment. The fully threaded length meant I could cut them down without wasting any, and all 400 arrived clean with no burrs on the sockets. Price per piece is hard to beat for th