براغي ذات رأس سداسي ثقيل مقاس 1 بوصة × 8 × 5 بوصة | ASTM A193 B7 سبيكة فولاذ عادي | ملولبة جزئياً (30/عبوة)

The knurling on these heads gives a solid grip even with oily gloves, and the 1"-8 threads cut clean without any binding. Took a full 5-inch length into a steel jig and torqued it down to spec with zero flex. These B7s are holding up great after a week of heavy vibration.

The partially threaded design made seating these in deep blind holes a breeze, and the 1"-8 thread pitch engaged smoothly without any binding. The plain finish is exactly what I needed for a flange joint where I was already applying anti-seize. Solid set of 30 for the price.

Needed a solid batch of 1"-8 x 5" fasteners for a compressor rebuild, and these B7s are exactly what I wanted. The partial threading caught perfectly on the coupling, and all thirty came with clean, uniform threads and no burrs. They’ve held up to serious torque without a hint of stripping.