براغي رأس سداسي ثقيلة 1 بوصة-8 × 4-1/2 بوصة | ASTM A193 B7 من سبائك الصلب العادي | خيط جزئي (30 / عبوة)

Dead-on dimensions—these 1"-8 x 4-1/2" heavy hex heads mated perfectly with our hydraulic press flanges. The partially threaded shank gave just enough grip without bottoming out in the blind hole, and the plain finish is free of any burrs or oil residue.

The threads on these B7 alloy screws cut cleanly into the steel I was joining, and the partial thread gave me just the right grip for the deep flange. Solid weight to them, and the hex head grabbed cleanly with a standard socket.

These bolts handled the heavy equipment assembly without a hitch, and the partial threading made alignment a lot easier than full-threaded ones I've used before. The 1"-8 size fit the nut perfectly right out of the package, and the alloy steel feels solid for the load.