براغي رأس سداسي 1/2-13 × 1-7/8 بوصة | صناعة أمريكية | درجة 8 فولاد أصفر زنك | ملولبة جزئيًا (50/عبوة)

Grabbed a box for a job rebuilding a conveyor drive, and the yellow zinc finish still looks factory-clean after a week of wrenching. The head size is dead-on, too, so my 13/16 socket seats flush every time.

The partial threading is exactly what I needed for clamping down on a fixture without chewing up the threads. These grade 8s torqued down smooth and the yellow zinc looks sharp on the equipment.

The yellow zinc finish on these grade 8 bolts looks really clean and durable, and the partial threading made them easy to snug up in a tight bracket. Used a dozen on a press repair and every one threaded smooth without binding.