Boneham P406IZ Press Fit Headless Drill Bushing

Product Description

The BONEHAM P406IZ is a press fit headless drill bushing used to guide drill bits and cutting tools with precision in jig and fixture applications. It features a 0.339-inch inside diameter, a 5/8-inch outside diameter, and a 3/8-inch overall length. The headless design sits flush with the jig plate surface, making it suitable for close-tolerance work where a flanged head would interfere. Constructed from steel, this bushing is a non-renewable type, meaning it is pressed directly into the jig plate bore and stays in place for the life of the fixture. Machinists and toolmakers install this bushing in production and precision drilling setups.

This bushing is used in drill jigs and machining fixtures in manufacturing, fabrication, and tool-and-die environments. The P industry code designation identifies the bushing series, which corresponds to a standardized outside diameter and length series recognized across the tooling trade. The 0.339-inch bore diameter corresponds to a letter R drill size, making it compatible with standard fractional and letter-size drill applications. It is suitable for both light-production and high-volume drilling operations where repeatable hole location is required.

Key Features

• Press fit installation for permanent, fixed placement in jig plate bores
• Headless design sits flush with plate surface — no flange interference
• 0.339-inch inside diameter with a close tolerance of +0.0001 to +0.0005 inches for precise drill guidance
• 5/8-inch outside diameter and 3/8-inch overall length for compact fixture integration
• Steel construction provides hardness and wear resistance for repetitive drilling cycles
• Non-renewable type — designed for permanent press fit retention

Compatibility

Designed as an OEM-style replacement or new-installation component for drill jigs and machining fixtures requiring a P-series headless press fit drill bushing with a 0.339-inch bore and 5/8-inch outside diameter.

Installation Notes

Press fit bushings are installed by machinists or toolmakers using an arbor press or hydraulic press — never drive them in with a hammer, as this can damage the bore tolerance or distort the bushing. The receiving bore in the jig plate must be machined to the appropriate interference fit dimension to ensure proper retention. Verify bushing seating is flush and square to the plate surface before placing the fixture into service.