براغي رأس سداسي 1/4-28 × 2-1/2" | صناعة أمريكية | سبائك فولاذ L9 زنك أصفر | خيط جزئي (100 / عبوة)

The partially threaded design made all the difference for my mounting project, letting the smooth shank pass through the bracket before the threads caught the nut. These bolts seated firmly with my socket, no slipping or cam-out at all. Exactly the heavy-duty feel I was hoping for.

The yellow zinc coating on these Grade L9 bolts is holding up perfectly in my shop jig build. The 2-1/2" length was just right for clamping a thick stack of steel plates together.

Installed these on a piece of heavy-duty farm equipment and the L9 alloy steel handled the torque without any distortion. The yellow zinc finish looks clean and professional.