3/8-16 X 5/8" 六角頭キャップスクリュー | グレード8鋼イエロージンク | 全ねじ (1200本/パック)

Used these to reattach a skid plate on my truck and the grade 8 steel handled the torque without stripping. The yellow zinc coating is still bright after a few weeks in damp conditions.

The hex heads seated cleanly with a socket wrench, and the yellow zinc finish looks uniform across all 1,200 pieces. Grade 8 hardness gives me confidence these won't strip out under heavy torque on our assembly line.

I was skeptical about buying a full box of these, but the hex heads are cut clean and the yellow zinc finish is even across every single one. The fully threaded shank bites nicely into our steel brackets, and a 3/8 socket seats perfectly every time. For the count you get, this is a solid stock-up bu