Boneham LS3 Drill Bushing Lock Screw 3/8-16 1 in

Product Description

The BONEHAM LS3 is a drill bushing lock screw designed to secure press-fit and slip-renewable drill bushings in jig plates and fixture bodies. The screw features a 3/8-16 thread and measures 1 inch in overall length, with a 3/4-inch head diameter and a 7/16-inch shoulder diameter. The combined head and shoulder length is 3/8 inch. Machinists, tool and die makers, and fixture builders install this fastener when assembling drill jigs that require positive bushing retention under repeated tooling passes.

The LS3 lock screw is used in metalworking and machining applications where slip-renewable drill bushings must be locked in position during drilling, reaming, or boring operations. It is suited for production jig fixtures in both job shop and manufacturing environments where bushing replacement frequency demands a reliable, thread-engaged retention method.

Key Features

• 3/8-16 thread size provides secure engagement in standard jig plate tapped holes
• 3/4-inch head diameter for positive bearing surface over bushing flange
• 7/16-inch shoulder diameter sized to locate accurately against bushing head
• 1-inch overall length suits standard jig plate thicknesses
• 3/8-inch combined head and shoulder length for controlled seating depth

Compatibility

Designed as an OEM-style retention fastener compatible with standard slip-renewable drill bushings requiring a 3/8-16 lock screw.

Installation Notes

Installation is performed by qualified machinists or toolmakers during jig assembly or bushing replacement. Ensure the jig plate is secured and clear of cutting tools before removing or installing the lock screw. Use a properly sized driver or wrench to seat the screw without overtightening, which can damage the bushing flange or the tapped hole. Follow applicable workplace safety and fixture standards for the machining environment.