Boneham H404KA Press Fit Headed Drill Bushing Steel

Product Description

The BONEHAM H404KA is a Type H press fit headed drill bushing manufactured from steel for use in jig and fixture applications. It features an inside diameter of 0.397 inches with a tight tolerance of +0.0001 to +0.0005 inches, a body outside diameter of 5/8 inch, and a length under head of 1/4 inch. The head outside diameter measures 51/64 inch with a head height of 7/32 inch. Designed for permanent installation, this bushing guides drill bits and other cutting tools with precision and is installed by machinists and toolmakers in production drilling operations.

The H404KA is suited for use in drill jigs and fixtures in machine shop environments where repeatable hole location accuracy is required. The press fit installation method means the bushing is driven permanently into a jig plate and is not intended for removal and replacement. It is a fixed, non-renewable bushing appropriate for high-volume drilling operations on metalworking production lines and job shop setups alike.

Key Features

• Type H headed design provides a positive stop against the jig plate surface for consistent seating depth
• Press fit installation method ensures a secure, permanent hold without fasteners
• Inside diameter tolerance of +0.0001 to +0.0005 inches for precise tool guidance
• Steel construction offers durability under repeated drilling cycles
• Non-renewable design optimized for permanent fixture use
• Head outside diameter of 51/64 inch and head height of 7/32 inch for standard counterbore compatibility

Compatibility

Designed as an OEM-style replacement or new-installation press fit headed drill bushing for standard drill jig and fixture plates requiring a Type H bushing with a 0.397 inch inside diameter and 5/8 inch body outside diameter.

Installation Notes

Installation is performed by toolmakers or machinists using an arbor press or hydraulic press to drive the bushing flush into a pre-drilled and reamed jig plate hole. Power down any associated machinery before working on fixtures. Ensure the receiving hole in the jig plate is reamed to the correct interference fit tolerance before pressing the bushing in. Because this is a non-renewable bushing, removal will typically damage either the bushing or the plate, so verify placement before pressing.