5/16-18 × 1-3/4" براغي رأس سداسية من الفولاذ من الدرجة 5 مطلي بالزنك الأصفر بخيط جزئي (100/عبوة)

The threads grabbed cleanly on the first try and the yellow zinc finish looks uniform across all 100 pieces. Used them to bolt down a steel bracket on my milling stand, and the partial threading made alignment way easier than dealing with fully threaded bolts.

Was looking for a partially threaded 5/16 bolt for a jig I'm building and these fit the bill perfectly. The yellow zinc coating is consistent and the threads were clean, no issues starting them by hand.

I’ve been using these for mounting a small engine bracket, and the partial thread lets me get a solid bite without bottoming out. The hex head fits my socket perfectly, so far no stripping or rust.