براغي رأس سداسية 3/8-16 × 1-3/4 بوصة | فولاذ درجة 5 زنك أصفر | ملولبة جزئيًا (600/عبوة)

Picked up a box for rebuilding a shop press, and the yellow zinc coating is holding up nicely against oil and grime. The partially threaded shank gives just the right grip depth without bottoming out.

Installed these on a machinery guard where vibration was an issue, and the partially threaded design grabbed tight without loosening. The hex head sat flush in my socket and the yellow zinc gives them a clean, uniform look. Exactly what I needed for a secure industrial fastening job.

The yellow zinc coating on these is a nice touch—uniform finish and no flaking during installation. The partial threads grabbed cleanly into my equipment frame, and all 600 in the box were consistent. Steady torque with a socket, no stripping.