براغي رأس مقبس 3/4-10 × 2-1/2 بوصة | محرك مقبس سداسي | صناعة أمريكية | سبائك فولاذية مؤكسدة حرارياً باللون الأسود (25/عبوة)

For a jig I'm building, the hex socket drive seated perfectly with my Allen key, no stripping or wobble. The 2-1/2" length is exactly right for the 3/4-10 thread, and the thermal black oxide gives them a tough, consistent look. These feel solid enough for repeated machine work, and the 25-pack cover

The black oxide finish on these screws is perfect for my machine tooling—no glare and they thread in smoothly without galling. The hex socket drive grabbed cleanly with my Allen key, and all 25 heads seated flush on the jig. Exactly what I needed for a precision assembly.

Put these into a drill press jig today and the hex drive held perfectly without stripping. The black oxide finish looks durable and professional against the steel. Exactly the consistent quality I was hoping for from US-made fasteners.