5/16-18 × 1-1/2" براغي رأس مخروطي لمقبس سداسي | فولاذ سبائكي (100/عبوة)

I used these for a small metal frame project, and the 1 1/2" length was just right for getting a solid grip through the bracket. The cone point actually helps start the threads straight.

The hex socket drive made it easy to tighten these in a cramped spot where a wrench wouldn't fit. The alloy steel feels sturdy and well-made, and the cone point precisely centered into my work.

The cone point locked into the keyway perfectly on my lathe, and the hex socket let me torque them down in a tight spot without slipping. All 100 screws were clean and consistently threaded, which is always a relief when buying hardware in bulk.