5/16-18 X 1" 內六角螺絲 | 低頭六角驅動 | 全螺紋 | 18/8 不鏽鋼 (100個/包)

Used these on a custom jig build and the 18/8 stainless finish handled the shop environment without a hint of corrosion. The hex socket drive grabbed cleanly every time, no stripped heads even with a bit of torque. Just wish they came in smaller quantities, but a hundred will get used eventually.

The low head profile on these is perfect for tight spots on my tooling fixtures where a standard cap screw would never fit. Threads are clean and they seat beautifully — all 100 in the pack are true to size.

The hex socket drive grips well with a standard Allen key, and the low head profile is handy for tight spots on my jigs. They’re solid 18/8 stainless, but the threads felt a bit gritty going into pre-tapped holes, so I’d give them a pass for anything precision.