براغي رأس سداسي 5/16-18 × 3/4 بوصة | صناعة أمريكية | فولاذ سبيكة PFC9 أصفر زنك (200/عبوة)

Yellow zinc coating is evenly applied, no flaking or bare spots after tightening down a whole machine frame. The PFC9 alloy steel feels dense and solid in hand, and all 200 threaded cleanly with no jams or cross-threading. USA-made quality shows in the uniform head height across the entire box.

The hex heads on these bolts grab a socket wrench perfectly, no slipping or rounding out. Great for mounting a heavy jig to my drill press table—so far not a single one has stripped.

I needed a solid batch of 5/16-18 bolts for a jig I'm building, and these cap screws fit the bill perfectly. The yellow zinc coating was consistent across all 200 pieces, and they drove easily with a socket without any stripping.