Boneham Metal Products Inc.

Boneham Metal Products supplies high-precision drill bushings, L-pins, T-pins, and dowel pins for fixturing, alignment, and press-fit applications. Manufactured to exacting standards, these components are trusted across aerospace, automotive, defense, and general machining industries.  Representation includes Iowa, Nebraska, Kansas, and Missouri, with local support for manufacturers and distributors across key regional markets.

Boneham is also the exclusive North American representative for Koenig Expanders—mechanical sealing plugs designed for permanent, pressure-tight sealing of cross-holes in hydraulic, pneumatic, fuel, and brake systems. Koenig Expanders are can be used in both aerospace systems and agricultural equipment manufacturing, where fluid control reliability and sealing integrity are critical to performance and safety. These expanders eliminate the need for threaded plugs or sealants, offering a clean, tamper-resistant sealing solution for demanding applications.
327 N 14th Street
Kenilworth, NJ 07033,
Tel;: (908) 272 – 1200
Toll Free: (800) 631 – 7852
Fax:: (800) 526 – 9494

Featured Products

Drill Bushings
Precision Hole Guidance and Wear Resistance

Boneham Metal Products’ Drill Bushings are manufactured to exacting standards to provide precise hole location guidance, improved tool life, and long-term wear resistance in jigs, fixtures, and assembly tooling. BMP offers a full range of standard press-fit (P type), renewable (S type), and liner (L type) bushings, manufactured from high-grade hardened steel (typically through-hardened to 60–64 HRC) or available in alternative materials like stainless steel for corrosion resistance.
Standard sizes conform to ANSI, ISO, and DIN specifications, with fractional, decimal, letter, and metric diameter options.

Custom and special bushings—such as headless, headed, or special profile bushings—are also available to meet unique application requirements.

Whether used for drilling, reaming, or tapping operations, BMP’s drill bushings ensure consistent accuracy and durability even in high-production environments.

Koenig Expanders
Reliable, Permanent Sealing Solutions

Boneham Metal Products supplies Koenig Expanders, the industry-leading solution for permanently sealing drilled holes in hydraulic components, valve bodies, and pressure vessels. Certified to ISO 9001 and IATF 16949 standards, Koenig Expanders are trusted globally in critical applications across automotive, aerospace, fluid power, and medical industries.
Available in a wide variety of styles—including SFC (sealing only), SKC (sealing and mechanical retention), and LPC (low pressure sealing)—Koenig Expanders deliver proven leak-proof performance without the need for welding, sealing compounds, or threaded fittings.

Standard sizes cover hole diameters from 1.8 mm (0.071") up to 22 mm (0.866"), with working pressure capabilities exceeding 500 bar (7,250 psi) depending on the series. Installation is fast, reliable, and requires minimal tooling, reducing assembly time and manufacturing costs.

Dowel Pins
Precision Alignment and Fastening

Boneham Metal Products’ Dowel Pins are engineered for critical alignment, location, and fastening applications requiring exact dimensional tolerances. Available in hardened steel (RC 60–64), stainless steel (typically 303 or 416 grade), and metric or inch sizes, BMP dowel pins conform to industry standards including ASME B18.8.2, DIN 6325, and ISO 2338.
Offered in standard, oversized, undersized, and special configurations, Boneham's dowel pins provide superior shear strength, corrosion resistance, and repeatable positioning accuracy.

Applications range from automotive assembly and aerospace tooling to precision mold and die work, where secure, slip-fit or press-fit engagement is critical. BMP’s tight quality controls ensure consistent pin straightness, diameter tolerance, and surface finish, guaranteeing a reliable fit every time.