براغي ذات رأس مقبس 1-3/8-6 × 16" | محرك مقبس سداسي | خيط جزئي | فولاذ سبائكي مع أكسيد أسود حراري

Installed these on a heavy-duty press fixture and the partially threaded shank gave me just the right grip depth without bottoming out. The black oxide finish held up well during assembly with no galling on the threads.

Installed these on a heavy jig I'm building, and the black oxide finish on the alloy steel threads held up perfectly during assembly. The hex socket drive made tightening them in tight spaces a lot easier than a standard bolt.

Finally got the 16" length I needed for a deep jig setup—the partially threaded section makes alignment much easier. The black oxide finish looks tough and should resist rust well in the shop.