مسامير نقل 5/16-18 × 8-1/2 بوصة | فولاذ عادي درجة A307 (50 / عبوة)

The square neck on these bolts grabbed perfectly into the wood on my trailer deck, no spinning at all while I tightened the nut. They’re a solid, no-frills choice for any heavy framing job.

I’ve been using these for a heavy gate hinge repair, and the square neck grabs the wood perfectly without spinning. The rounded head looks clean and sits flush, though a few bolts had slight burrs that needed a quick file.

Used these for a heavy-duty outdoor bench build and the 8-1/2" length was just right to go through thick pressure-treated lumber. The square neck locked into the wood perfectly, no spinning while tightening the nut.