مسامير عربة 5/16-18 × 3-1/4 بوصة | ملولبة بالكامل | فولاذ عادي من الدرجة A307 (600 / عبوة)

I needed a bulk set for a deck repair, and these 600 bolts in Grade A steel are exactly the right spec for outdoor framing. The fully threaded shafts make it easy to cut down if needed, and the dome head gives a clean look.

The square neck on these carriage bolts grabbed the wood perfectly, no spinning while I tightened them down. Good solid feel to the steel, and having 600 in the box means I'm set for multiple projects.

Installed a whole deck’s worth of these and not a single one spun on me, that square neck under the head bites in just right. The 3-1/4" length is perfect for going through 2x material with room for a nut and washer. At 600 per box, I’ve got plenty left for future projects.