براغي رأس سداسية ثقيلة 5/8-11 × 8-1/2 بوصة | ASTM A193 B7 سبيكة فولاذ عادي | ملولبة جزئيًا (50 / عبوة)

The threads cut clean and the hex heads grabbed a wrench without any rounding. I used a full 50-count box on a jig frame and didn't get a single bad one, and the B7 alloy feels plenty tough for my shop equipment. For the price per piece, these are a solid buy.

I needed heavy-duty bolts for a press repair, and these 8-1/2" long B7 alloy steel screws were exactly the right call. The partial threading made installation through the flanges and into the nut smooth without binding.

These bolts seated perfectly into my heavy-duty press frame, and the hex heads gave my socket wrench a solid grip. The 8-1/2 inch length was exactly what I needed for a thick flange assembly.