براغي رأس أسطوانية 1/2-13 × 1 بوصة | رأس زرية مع محرك سداسي | حبيبات نايلون | ملولبة بالكامل | فولاذ سبائكي بطبقة أكسيد سوداء حرارية (100/عبوة)

I needed a batch of strong, consistent screws for a new jig and these 1/2-13 x 1" button heads fit perfectly. The hex socket drive makes installation with an Allen key quick and secure, and the black oxide coating feels durable.

The hex socket drive seated perfectly on my torque wrench without any stripping, and the black oxide finish gives them a clean, professional look on my fixture plates. Threads were consistent across all 100 pieces, and the nylon pellet locks tight enough that I didn’t need threadlocker on a vibratin

The nylon pellet locking feature is a game-changer for keeping these 1/2-13 screws secure on my jig without needing threadlocker. They drive in smoothly with a hex key and the black oxide finish looks clean against the steel.