براغي رأس مقبس 1-3/8-6 × 4-1/2" | محرك مقبس سداسي | خيط جزئي | فولاذ سبائكي مع أكسيد أسود حراري

The hex socket drive made installation a breeze with my standard Allen wrench set, and the 4-1/2" length gives just enough grip for the heavy jig I'm building. The partially threaded design holds firm under pressure without stripping.

The black oxide finish on these screws handled my heavy-duty machining setup without any signs of wear after multiple adjustments. The 4-1/2" length was exactly what my precision jig needed, and the hex drive made installation straightforward even in a tight space.

The thermal black oxide coating on these screws seems really durable — no chips or scratches after tightening into my fixture. The hex drive bit seated firmly without any wobble.