重型六角螺絲 | 1"-8 X 3-1/2" | ASTM A193 B7 合金鋼原色 | 部分螺紋 (35 個/包)

Threads are clean and the plating looks uniform across all 35 pieces—no burrs or rough edges that would gall during torquing. The partial threading on these 1"-8 bolts gave me the exact grip I needed for a flange setup without shimming.

Used these on a heavy press rebuild and the threads cut cleanly without any galling. The plain finish is fine for indoor machinery, and the partial threading gave me just the right grip length.

The 1"-8 threading was coarse and clean on all 35 pieces, so they seated into my equipment’s tapped holes without any binding. These heavy hex heads gave me a solid grip with a wrench, and the plain finish looks properly industrial. Just what I needed for a heavy assembly job.