Industrial Metal Finishing Since 1953

+860-223-6412

New Britain, CT · NADCAP | ISO 9001:2015

NADCAP Accredited · ISO 9001:2015 Certified

Industrial Metal

Finishing

Since 1953

From routine coating to complex finishing requirements, JH Metal Finishing helps manufacturers, machine shops, defense suppliers, and industrial teams meet strict finishing specifications with confidence.

Areas of Expertise

Our Services

Conversion Coatings

Other Individual Specifications as Needed

Black Oxide

Matte black finish with minimal dimensional buildup. MIL-DTL-13924 · AMS 2485

Zinc Phosphate

Pre-treatment coating for paint adhesion and corrosion protection. MIL-DTL-16232 Type Z · AMS 2480

Manganese Phosphate

Wear-resistant coating that helps reduce seizing and hold lubricants. MIL-DTL-16232 Type M · AMS 2481

Quick Finish Guide

Not Sure Which Finish Fits Your Part?

Start with your goal. We’ll help confirm the right finish when you upload your RFQ.

REDUCE CORROSION

BLACK OXIDE / PHOSPHATE / CERAKOTE

IMPROVE PAINT ADHESION

ZINC PHOSPHATE

REDUCE WEAR OR SEIZING

MANGANESE PHOSPHATE / DRY FILM LUBRICANT

NEED DRY LUBRICATION

DRY FILM LUBRICANT

NEED INSPECTION/TESTING

SALT SPRAY / WATER BREAK / COATING WEIGHT

Quality & Documentation

Process Controls for
Documented Finishing Work

JH Metal Finishing supports specification-driven work with process controls, inspection, testing, and documentation appropriate to the finish and customer requirements.

Pre-Process Review

We review drawings, finish
requirements, materials, and applicable specs before processing begins.

Process Control Checks

In-process controls help verify surface preparation, coating requirements, and
finish consistency.

Documentation

Certificates of conformance and
quality documentation support
customer & specification requirements.

Trusted for Specification-Driven Finishing

Why Manufacturers Choose JH Metal Finishing

Certified systems, technical experience, and responsive support help manufacturers move critical parts through finishing with confidence.

Standards-Based Processing

Processing to MIL, AMS, ASTM, and customer-specific requirements.

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Certified Quality Systems


NADCAP and ISO 9001:2015 certified for documented quality.

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Responsive RFQ Support

Clear quote inputs and finish guidance help move projects forward faster.

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Built for Industrial Customers


Serving defense, aerospace, automotive, machine shops, and industrial manufacturers.

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Common Specifications Supported

MIL-DTL-13924

MIL-DTL-16232

MIL-PRF-46010

MIL-PRF-46147

AMS 2480

AMS 2481

AMS 2485

ASTM B117

ASTM A967

ASTM F-22

Have a drawing or
specification ready?

Request a Quote →