M5-0.8 X 100mm 內六角螺絲 | 內六角驅動 | 部分螺紋 | 12.9級合金鋼熱處理黑氧化 (200顆/包)

Had to tighten down some fixture clamps on a jig table, and the full 100mm length gave me just enough thread engagement. The hex socket drive seated perfectly without any stripping worries.

The black oxide finish on these M5 screws looks professional and has held up well against oil and handling during assembly. They thread smoothly into the jigs I’m building, and the 100mm length gives me just enough reach for thick fixtures.

Used these to rebuild a precision assembly fixture and the hex socket drive seated perfectly with no stripping, even torqued down hard. The black oxide finish looks consistent across all 200 pieces, no burrs or rough edges on the threads. For the price, these are solid.