M5-0.8 X 45mm 內六角螺絲 | 六角驅動 | 部分螺紋 | 8.8級合金鋼鍍鋅 (300 / 包)

Threads were cleanly cut and the hex socket seated perfectly on my driver, no stripped heads across all 300. The partial threading on these 45mm ones held tight in my tooling fixture without any wobble.

Used these for a jig I was building and the hex drive seated perfectly without any cam-out. The 45mm length was exactly what I needed for those deeper clamping setups.

Zinc plating looks even and consistent across all 300 pieces, and the hex socket drive bites cleanly without stripping. Used them to rebuild a jig fixture and every single one threaded in smooth, no duds in the box.