Precision Shoulder Screws Pan Washer Fine Thread Shoulder Bolt

Precision shoulder screws are designed according to the client’s request. The screws with pan washer head and Phillips drive and a shoulder just under the head. Ever Hardware provides custom-made fasteners and customizable packaging.

Shoulder bolt is a screw with an unthreaded shoulder that is larger in diameter than the threads. Also known as stripper bolt. The cylindrical shoulder that allows for the rotation of attached parts like pulleys, gears, moving parts of engines and mechanical assemblies, and rolling wheels. Shoulder bolt also used to attach stripper plates. The socket head enables high torque fastening with limited clearance.

The pan washer head design could possibly be the most versatile head design available. It combines the advantages of the pan head but has a washer built onto the head to increase head diameter and prevent over driving in softwoods while providing a maximum bearing surface. These fasteners have Square-Phillips combo recess drive designed to offer the dependability of a square drive recess with the convenience and after-market serviceability of a Phillips drive. In addition, they have coarse thread design for superior holding power while reducing splitting or crumbling of the material, allowing the fastener to install rapidly with full thread engagement after just one revolution. The threaded surface is nearly perpendicular to the screw axis, providing great resistance to pullout.

Galvanization, or galvanisation, (or galvanizing as it is most commonly called in that industry), is the process of applying a protective zinc coating to steel or iron, to prevent precision shoulder screws rusting. The most common method is hot-dip galvanizing, in which parts are submerged in a bath of molten zinc.