M4-0.7 x 12mm 內六角螺絲 | 鈕扣頭內六角 | 全螺紋 | 等級12.9 合金鋼 熱處理黑色氧化 (600個/包)

Installed these in a jig I’m building and they threaded in perfectly with zero stripping. The hex socket drive makes it easy to apply torque without cam-out.

The black oxide finish on these screws looks great and seems durable, and the hex drive fit my Allen wrench perfectly without any stripping. I used them to secure brackets on a jig, and they held tight under moderate load.

Used them to build a jig for a prototype assembly and the threads bit in cleanly every time. The black oxide finish looks solid and the 12.9 hardness gives me confidence they won’t strip under load. Exactly what I needed for the price.