Boneham H404IU Press Fit Headed Drill Bushing Type H

Product Description

The BONEHAM H404IU is a press fit headed drill bushing manufactured from steel and built to guide drill bits with precision in jig and fixture applications. It features a 21/64-inch inside diameter and a 5/8-inch body outside diameter, with a length under head of 1/4 inch. The head outside diameter measures 51/64 inch and the head height is 7/32 inch. This bushing is installed without threading or locking hardware — it presses directly into a prepared hole in a drill jig plate. Machinists and tooling specialists rely on this type for high-repetition drilling operations where accurate hole location must be maintained.

The H404IU is suited for use in production drilling jigs and fixtures across general metalworking, machining, and fabrication environments. Type H headed bushings seat flush against the jig plate surface, providing a positive stop that prevents the bushing from being driven deeper under drilling pressure. This makes them appropriate for fixed-station drilling setups where the bushing does not need to be swapped out between operations. The inside diameter tolerance of plus 0.0001 to plus 0.0005 inch supports consistent, repeatable hole placement across production runs.

Key Features

• Press fit installation — no threads or locking collar required
• Inside diameter: 21/64 inch with a tolerance of plus 0.0001 to plus 0.0005 inch for precise drill guidance
• Body outside diameter: 5/8 inch; head outside diameter: 51/64 inch
• Length under head: 1/4 inch; head height: 7/32 inch
• Steel construction for durability in repetitive drilling applications
• Non-renewable design — intended as a permanent press fit installation

Compatibility

Designed as an OEM-style Type H press fit headed drill bushing for use in standard drill jig plates where a permanent, headed bushing is required.

Installation Notes

Installation is performed by a machinist or tooling technician using an arbor press or similar controlled pressing equipment. The receiving hole in the jig plate must be machined to the appropriate tolerance to achieve proper press fit retention. Ensure the jig plate is secured and the bushing is aligned squarely before pressing to prevent galling or cocking. Remove any chips or debris from the bore before pressing the bushing into place.