Boneham P404KQ Press Fit Headless Drill Bushing Steel

Product Description

The BONEHAM P404KQ is a press fit headless drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Built to ANSI standards, this Type P bushing features a 7/16 inch (0.4375 inch) inside diameter, a 5/8 inch body outside diameter, and a 1/4 inch overall length. Manufactured from steel hardened to 60 to 65 HRC, it delivers the wear resistance required in production jig and fixture applications. The inside diameter tolerance of +0.0001 to +0.0005 inches ensures consistent tool guidance and repeatable hole location across high-volume runs.

This bushing is suited for use in drill jigs and fixture plates in machine shops, tool rooms, and manufacturing environments. It installs directly into a prepared bore without a locking head, making it appropriate where a low-profile, permanent bushing is needed. The headless design keeps the top face flush with the jig plate surface, reducing interference with workpiece clamping and part handling. Machinists and toolmakers typically install this type of bushing during fixture fabrication or maintenance.

Key Features

• Type P press fit installation - no locking head, permanent seating in the jig plate bore
• Steel construction hardened to 60 to 65 HRC for extended wear life under repeated tool contact
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Headless profile keeps the bushing face flush with the fixture plate surface
• Meets ANSI standards for drill bushing dimensions and tolerances
• Non-renewable design - intended as a fixed, long-service installation in the jig

Compatibility

Designed as an ANSI-standard Type P headless press fit drill bushing for use in drill jigs and fixture plates requiring a 7/16 inch tool bore and a 5/8 inch OD body seat.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or hydraulic press into a precision-bored hole in the jig plate. The receiving bore must be machined to the correct interference fit per ANSI specifications before installation. Once seated, these bushings are not intended for removal or replacement without re-boring the jig plate. Ensure the jig plate is securely fixtured and properly supported during pressing to avoid distortion.