مسامير نقل 1/4-20 × 3-1/2 بوصة | فولاذ مطلي بالزنك (100 / عبوة)

I needed to fasten a heavy wooden bench to a concrete floor, and these 1/4-20 x 3-1/2" carriage bolts held tight with no stripping. The zinc coating looks clean and should resist rust.

The square shoulder on these bolts really digs in and prevents spinning as I tighten the nut, which is a lifesaver when working alone. Full length threads let me adjust the depth precisely for my structural framing project.

The square neck grabbed the wood perfectly on my deck repair, no spinning or cursing like with regular bolts. Zinc plating looks clean and uniform across all 100 pieces, and the 3-1/2" length gave me plenty of bite through the 2x6s.