M8-1.25 X 40mm 內六角螺絲 | 六角驅動 | 全牙 | 18/8 不鏽鋼 (100/包)

The hex socket drive seats perfectly on my Allen wrench, and the threads cut cleanly into my tooling fixtures without any binding. I've used about thirty of these on a precision assembly and every single one torqued down smoothly to spec.

Installed these on a jig I'm building and the hex socket drive fit my wrench perfectly. The 18/8 stainless steel feels solid and should hold up well without rusting.

Finally found M8 cap screws that didn't round out on me—the 18/8 stainless feels noticeably tougher than the cheap zinc ones I'd been using. Worked perfectly for a jig I was building, and the hex socket gave a clean, secure grip even after tightening multiple times.