#8-32 × 1/4" 內六角螺絲 | 六角驅動 | 美國製造 | 合金鋼熱處理黑色氧化物 (400個/包)

Used a batch to rebuild a jig at the shop and every single screw seated flush without any binding issues. The black oxide finish feels durable and the #8-32 thread held tight under torque.

The hex socket drive grips the allen key without any slop, which makes a huge difference when you’re snugging them into a jig. Four hundred of these in one box means I probably won't need to reorder for a year, and the black oxide arrived looking clean and uniform.

Needed some for a small tooling fixture and these threaded in perfectly without any wobble. The black oxide finish looks clean and the hex drive bites well with my Allen wrench.