Boneham H404JR Press Fit Headed Drill Bushing

Product Description

The BONEHAM H404JR is a Type H press fit headed drill bushing designed to guide cutting tools with precision in jig and fixture applications. It features an inside diameter of 0.377 inches (Letter V), a body outside diameter of 0.625 inches, and a length under head of 0.25 inches. Constructed from steel hardened to 60 to 65 HRC, this bushing delivers the wear resistance required for repeated drilling cycles. The inside diameter tolerance of +0.0001 to +0.0005 inches ensures consistent tool guidance and hole location accuracy. Machinists, tool and die makers, and production fixture builders install this type of bushing in drill jigs where a permanent, non-renewable press-in style is appropriate.

This bushing is suited for use in drill jig plates and machining fixtures across general metalworking, production manufacturing, and toolroom environments. Its headed design seats flush against the jig plate surface, resisting axial pull-out during drilling operations. The head outside diameter measures 0.797 inches and the head height measures 0.219 inches, providing a positive stop against the jig plate face. It conforms to ANSI standards, making it a direct fit where standard Type H drill bushing geometry is called out on fixture drawings.

Key Features

• Press fit installation — no locking collar or retaining screw required
• Steel construction hardened to 60 to 65 HRC for extended wear life
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Headed design provides positive axial stop against jig plate surface
• Conforms to ANSI standards for Type H drill bushing geometry
• Non-renewable fixed bushing — intended for permanent installation in jig plate

Compatibility

Designed as an OEM-style replacement or original-use component for drill jigs and machining fixtures that require a standard ANSI Type H press fit headed drill bushing with a 0.377 inch inside diameter and 0.625 inch body outside diameter.

Installation Notes

Press fit bushings are installed by qualified machinists or toolmakers using an arbor press or hydraulic press — never drive with a hammer directly on the bushing head, as this can damage the bore or distort the head seating surface. The jig plate bore must be sized and finished to the appropriate interference fit tolerance before installation. Once pressed in, this bushing is not designed for removal and replacement. Confirm the bushing is fully seated and the head face is flush and square to the plate surface before placing the fixture into service.