3/8-16 X 3-1/4" 六角頭螺絲 | 美國製造 | PFC9合金鋼黃鋅 (425支/包)

Bought these for a repair project and the hex heads drove cleanly with a socket, no stripping. The 3-1/4" length was just right for what I needed, and the yellow zinc finish looks solid.

The yellow zinc coating is holding up great against the grease and grime in my shop, and these hex heads fit my socket perfectly. Threads are clean and uniform across all 425 screws, so threading them into equipment went without a hitch.

I needed a full box for a job reassembling some old equipment, and these hex heads threaded in smooth and tight every time. The USA-made alloy steel feels way more solid than the standard bin bolts I've used before.