براغي رأس سداسي ثقيلة 7/8-9 × 3-3/4 بوصة | فولاذ سبائكي ASTM A193 B7 عادي | خيط جزئي (50/عبوة)

Used these on a heavy press rebuild and the hex head gave my socket a solid bite without any stripping. They torqued down evenly and held tight under full load.

The partial threading on these B7 bolts made aligning them in a tight spot far easier than a fully threaded fastener would have. They drove in smooth with no binding, and the hex head gave my wrench a solid bite for torquing down. Exactly what I needed for a heavy machinery repair.

The threading is clean and the partial thread leaves plenty of grip for heavy equipment flanges. Seems plenty strong for the industrial jobs I've got lined up.