براغي رأس أسطوانية بمقبس سداسي 7/8-9 × 5-1/2 بوصة | محرك مقبس سداسي | حبيبات نايلون | خيط جزئي | فولاذ سبائكي مؤكسد حراريًا أسود (10/عبوة)

These finally let me finish the jig I’ve been putting off — the partially threaded length grabs perfectly without bottoming out, and the hex socket drive made torquing them down with an Allen key a breeze. The thermal black oxide coating gives them a nice, uniform finish that should hold up well in

I needed longer screws for a jig setup and these 7/8-9 x 5-1/2" ones fit the bill perfectly. The hex socket drive grabbed my Allen wrench securely without any stripping, even under decent torque. The thermal black oxide finish gave them a nice, consistent look that should resist corrosion well.

The partially threaded design made installation into a jig baseplate much easier than I anticipated. These screws bit cleanly into the alloy steel without any galling.