براغي رأس سداسي ثقيل 5/8-11 X 4-1/2" | ASTM A193 B7 سبيكة فولاذ عادي | ملولبة جزئياً (90 / عبوة)

These bolts threaded smoothly into my 5/8-11 tap without any binding, and the 4-1/2 inch length was perfect for the heavy equipment mount I was repairing. The B7 alloy steel feels much tougher than the grade 5 stuff I've used before.

I was impressed with the hex head’s grip during installation, and the B7 alloy steel feels sturdy enough for heavy machinery use. These 4-1/2 inch cap screws fit perfectly on our assembly line without stripping.

These partially threaded bolts worked perfectly for mounting a heavy gearbox—the 4-1/2" length gave me just enough grip without bottoming out. The B7 alloy feels seriously tough compared to the grade 5 stuff I usually grab.