Boneham H408JW Press Fit Headed Drill Bushing

Product Description

The BONEHAM H408JW is a Type H press fit headed drill bushing manufactured from steel with a hardness rating of 60 to 65 HRC. It features an inside diameter of 0.386 inches (Letter W tolerance) and a body outside diameter of 5/8 inches, with a 1/2-inch length under the head. This bushing is pressed permanently into a jig plate to guide drill bits, reamers, or other cutting tools with consistent accuracy. It is installed by toolmakers, machinists, and fixture builders in production and job-shop environments where repeatable hole location is required.

The H408JW is suited for use in drill jig fixtures across general metalworking, machining, and fabrication applications. Its headed design provides a positive stop against the jig plate surface, making it appropriate for through-hole guidance applications where axial positioning of the bushing is critical. The press fit installation method means this bushing is intended for permanent or long-service installations where the bushing does not need to be swapped between operations.

Key Features

• Type H press fit design for permanent installation in drill jig plates
• Inside diameter of 0.386 inches with tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Body outside diameter of 5/8 inches with a head outside diameter of 51/64 inches
• Head height of 7/32 inches provides a positive axial stop against the fixture surface
• Steel construction hardened to 60 to 65 HRC for wear resistance under repeated tooling contact
• Conforms to ANSI standards for drill bushing geometry and dimensional tolerances

Compatibility

Designed as an OEM-style replacement or direct-fit component for drill jig fixtures requiring a Type H press fit headed bushing with a 0.386-inch inside diameter and 5/8-inch body outside diameter per ANSI standards.

Installation Notes

Press fit bushings are installed by toolmakers or machinists using an arbor press or hydraulic press — never driven in with a hammer, as this can distort the bore. The receiving hole in the jig plate must be machined to the appropriate interference fit tolerance before installation. Once pressed in, this bushing is not designed for removal and reinstallation. Verify bore diameter and surface finish of the jig plate hole prior to pressing to ensure proper seating and alignment.