براغي رأس مقبس 7/16-20 × 4-1/2 بوصة | محرك مقبس سداسي | سبيكة فولاذ زنك أصفر (25/عبوة)

I've been using these to build a custom fixture, and the 4-1/2" length was perfect for going through multiple layers of steel plate. The zinc yellow finish feels durable and hasn't chipped during tightening.

The hex socket drive grabbed perfectly on my torque wrench without any slipping, and the 4-1/2" length was just right for the jig I was building. These are solidly made for precision work.

The zinc yellow coating on these 7/16-20 screws held up perfectly during a full day of jig assembly, no chips or scratches. Length is spot-on at 4-1/2", and the hex socket grabbed cleanly every time with my driver. Exactly what I needed for the tooling project.