براغي رأس سداسية 1-1/8-7 × 4-1/2" | صناعة أمريكية | درجة L9 سبيكة فولاذية زنك أصفر | خيط جزئي (12 / عبوة)

Used these on a heavy machinery rebuild, and the L9 alloy steel held up perfectly under high torque. The hex head gave my impact wrench a solid bite without any rounding.

The partially threaded section grabbed cleanly and seated my mounting bracket without any binding, and the yellow zinc finish wiped down nice. These L9 bolts took a breaker bar without a hint of flex.

These bolts are seriously beefy, the L9 alloy steel feels much tougher than the grade 8 stuff I've used before. I torqued them down on a heavy press and the yellow zinc held up perfectly, no stripping or galling.