1"-8 × 3" براغي رأس سداسي ثقيل | ASTM A193 B7 سبيكة فولاذ عادي (42 / عبوة)

The packaging was solid—all 42 of them arrived with threads clean and no oil residue mess. I’ve used cheaper alloy bolts that stripped under load, but these B7s held their torque on a pump flange without any give.

These bolts torqued down perfectly on my press bracket without any galling, which I've had trouble with on lesser steel before. The 1"-8 threads were clean and started easily by hand, saving me a lot of frustration.

I was a bit worried the threads wouldn’t match my equipment, but these B7 alloy screws threaded in cleanly with no binding at all. The 1"-8 x 3" size gave me plenty of grip for a heavy flange assembly.