Boneham H204FN Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H204FN is a Type H press fit headed drill bushing designed to guide cutting tools with precision during drilling, reaming, and boring operations. Manufactured from steel and hardened to 60 to 65 HRC, it provides a wear-resistant bore surface that maintains accurate hole location across repeated tool passes. The inside diameter measures 0.18 inches (wire gauge number 15) with a tight tolerance of plus 0.0001 to plus 0.0004 inches, ensuring consistent tool guidance. The head design seats flush against the jig plate, keeping the bushing positively located without a locking collar. Machinists, toolmakers, and fixture builders install this component in drill jigs and fixture plates across production and maintenance environments.

The H204FN is suited for use in drill jig applications where a permanent, non-renewable bushing is acceptable. The press fit installation method locks the bushing directly into the jig plate bore, making it appropriate for fixed, high-volume production fixtures where bushing replacement is not required. It is a standard catalog item conforming to ANSI specifications, making it a straightforward drop-in for new fixture builds or direct replacements of worn ANSI Type H press fit headed bushings of the same dimensions.

Key Features

• Press fit installation — no locking collar or set screw required
• Steel construction hardened to 60 to 65 HRC for extended wear life in high-cycle jig applications
• Inside diameter tolerance of plus 0.0001 to plus 0.0004 inches for precise tool guidance
• Head design positively locates the bushing against the jig plate face
• Conforms to ANSI standards for Type H headed drill bushings
• Non-renewable fixed design suitable for permanent fixture installations

Compatibility

Designed as an ANSI-compliant Type H press fit headed drill bushing for use in drill jigs and fixture plates requiring a 0.18 inch ID, 5/16 inch body outside diameter, and 1/4 inch length under head.

Installation Notes

Press fit bushings are installed by toolmakers or machinists using an arbor press or hydraulic press — never drive with a hammer directly on the head. The receiving bore in the jig plate must be machined to the correct interference fit tolerance per ANSI standards before installation. Once pressed in, the H204FN is not designed for removal and reuse. Always ensure the jig plate and bushing bore are clean and free of burrs before pressing to avoid galling or misalignment.