Metal Finishing
That Holds Up in the Field. Every Time.
H&H Engineered Coatings runs NADCAP-accredited plating processes to aerospace standards for fasteners, bushings, landing gear components, structural hardware, and more. We do it right. You get the documentation to prove it.
NADCAP
Accredited Facility
2
Active Certifications
5+
Plating Processes
US-Wide
Customer Base
Plating defects on flight-critical parts don't get second chances. We run a tight shop in Fort Worth with documented process controls, bath chemistry is titrated on a daily or weekly basis, and cert packages that actually hold up when your customer's quality team comes calling. We plate zinc nickel, cadmium, hard chrome, and passivation for OEMs, machine shops, fastener producers, and defense suppliers who don't have room in their schedule for a redo.
Zinc Nickel
Cadmium
Hard Chrome
Passivation
H.E. Relief
Salt Spray Testing
Centerless Grind
What We Do
Core Plating Processes
Every process tracked from rack to shipment. Specs, thickness logs, and cert documentation go out with every order.
Zinc Nickel Plating
This is what most OEMs are moving to. Our zinc-nickel has been tested to up to 1,000 hours in salt spray testing, passes the galvanic compatibility requirements for aluminum airframes, and doesn't carry cadmium's handling restrictions. We run it daily on fasteners, bushings, and structural hardware for aerospace and defense customers.
AMS2417AMS2461
Cadmium Plating
Still specified on active programs. Cadmium's lubricity makes it the right call for parts that get regularly removed and reinstalled, and its galvanic compatibility with aluminum is unmatched. We plate to full AMS requirements with complete cert packages, including hydrogen embrittlement relief baking for high-strength steels.
AMS-QQ-P-416
Hard Chrome Plating
Bushings. Landing gear struts. Actuator rods. Hydraulic cylinders. Hard chrome is how you restore dimensions and get wear resistance on parts that see real load cycles. We plate to AMS2460 with full thickness documentation. If your part needs to hit a specific surface hardness spec, we can work with that.
AMS2460
Passivation
Machining, welding, and forming all damage the natural oxide layer on stainless steel. Passivation restores it. We run nitric acid processes per AMS2700 with full method and class documentation. The results show up in your product's corrosion resistance, even if they're not visible to the eye.
AMS2700
Why H&H
Small Shop. Serious Work.
We're not a job shop processing 500 different parts from 200 industries. We focus on aerospace and defense finishing because that's where the tolerance for error is zero. That focus shapes everything: how we control our baths, how we write our travelers, how we answer the phone when you call asking where your parts are.
NADCAP accreditation isn't just a badge we put on the website. It means PRI auditors walked our floor, checked our chemistry logs, reviewed our documentation, and signed off on our processes. We renew it. We maintain it. And we use it to protect your program.
✓
NADCAP Chemical ProcessingCert #12521230913, active through November 2026. In-scope for zinc nickel, cadmium, hard chrome, and passivation.
✓
NADCAP Aerospace Quality System (AC7004)Cert #12521230914, active through November 2028. Our quality management system passes independent audit.
✓
In-House TestingSalt spray, thickness verification, and centerless grinding without shipping your parts to a second vendor.
✓
Documentation That Ships With the PartsCOC, process records, test data. Built to survive your customer's audit.
The Cert Package Matters as Much as the Coating
A lot of shops can put metal on metal. Not as many can hand you a NADCAP accredited COC that ties back to bath chemistry records, thickness measurements, and an audited process. We built our documentation system to hold up when it gets tested.
"NADCAP Accredited Chemical Processing & Aerospace Quality System. Fort Worth, Texas."
We handle these in-house. Fewer vendors, cleaner traceability, faster turnaround on your complete job.
Hydrogen Embrittlement Relief
Post-plate baking for high-strength steels above 180 ksi UTS. Required on most flight-critical fastener specs. We bake, document, and include it in your cert package.
Salt Spray Testing
In-house corrosion testing to verify coating performance before parts ship. Results go in the documentation package.
Thickness Verification
Measured on every lot. Data available as part of your cert package. Not a spot check. Every order.
Centerless Grind
Hard chrome parts need grinding after plate. We do it in-house. One vendor, one schedule, one contact.
Process Certification
COCs on every shipment, tied to actual process records. Not just a signature. Real documentation.
Lot Traceability
Every lot tracked from incoming inspection through final ship. Records retained and available for customer review.
Let's Work Together
Send Us the Spec
Tell us the process, the material, and the quantity. A follow up response will come within one business day. For time-sensitive jobs, call (682) 478-9453 directly.
Everything we run is tracked, documented, and shipped with a cert package built to hold up to your customer's quality system. No exceptions, no workarounds.
Line Card
Processes & Specifications
These are the specs we work to every day. Customer-specific requirements handled on a job-by-job basis. If yours isn't listed, please call and let's find a way that we can still meet your needs.
Zinc Nickel Plating
AMS2417
AMS2461
Cadmium Plating
AMS-QQ-P-416
Hard Chrome Plating
AMS2460
Passivation
AMS2700
Supplemental Services
In-House Supporting Capabilities
We don't outsource the things that matter. All of this happens under our roof, on your parts, before they ship.
H.E. Relief Baking
Mandatory for high-strength steels on most aerospace specs. We run it in-house and document every bake cycle.
Salt Spray Testing
In-house corrosion testing. Results documented and available as part of your cert package on request.
Thickness Verification
Measured on every lot, not just a sample. Spec conformance confirmed before the job ships.
Centerless Grind
Post-chrome grinding in-house. Your hard chrome job doesn't need a third-party grinder in the middle of the flow.
Process Certification
COCs issued on every job, tied to actual process traveler records. Not generic. Specific to your lot.
Lot Traceability
From incoming material through final ship. Records retained. Available for your quality team if they need them.
NDT Testing
Coming soon. Call us to discuss your NDT requirements in the meantime.
Spec Reference
Referenced Standards
A working reference of what we run. Additional customer specs handled on a job-by-job basis.
Process
Specification
Description
Zinc Nickel
AMS2417
Zinc-nickel alloy electrodeposited coating
Zinc Nickel
AMS2461
Supplemental requirements for zinc-nickel
Cadmium
AMS-QQ-P-416
Cadmium plating, electrodeposited
Hard Chrome
AMS2460
Hard chrome plating, functional deposit
Passivation
AMS2700
Passivation of corrosion resistant steels
Get Started
Have a Job to Quote?
Send us the spec, the print, and the quantity. A follow up response will come within one business day. Time-sensitive? Call (682) 478-9453.
We hold two active NADCAP accreditations. Both are independently audited by PRI. Neither is a self-certification. Look us up on eAuditNet if you need to verify before you put us on your ASL.
Active NADCAP Certifications
Both Certs. Active. Verified.
NADCAP covers the plating process and the quality management system separately. We hold both. That's not the norm for every shop.
NADCAP Accreditation
Active
Chemical Processing
This covers the actual plating processes: zinc nickel, cadmium, hard chrome, and passivation. It's the cert your prime contractor checks before they'll approve us as a source. PRI auditors reviewed our bath controls, our rack procedures, our documentation, and our test data. We passed. We maintain it every audit cycle.
Certificate No.
12521230913
Expiration Date
30 Nov 2026
Accreditation Length
12 Months
Administered By
PRI
NADCAP Accreditation
Active
Aerospace Quality System (AC7004)
AC7004 covers the quality management system behind the processes. It's a separate audit from the Chemical Processing cert, and it goes deeper: document control, corrective action processes, management review, operator qualification, and system-level quality controls. Most shops only hold one. We hold both.
Certificate No.
12521230914
Expiration Date
30 Nov 2028
Accreditation Length
36 Months
Administered By
PRI
Verify our accreditation status directly at www.eAuditNet.com on the Qualified Manufacturers List (QML). Certificate data is current to the revision in effect at the time of our audit. We're on there.
What "Audited" Actually Means
A PRI auditor walks your floor. Checks your bath chemistry. Pulls your travelers. Reviews your corrective action log. Tests your documentation against the spec. That's what NADCAP accreditation requires. It's not a questionnaire you fill out. It's a verification, on-site, by someone who knows the process.
What This Means for Your Program
Why It Matters to Your Supply Chain
NADCAP accreditation changes what we can offer you. Here's what it looks like in practice.
✓
Your prime contractor will accept us as a sourceBoeing, Lockheed Martin, Raytheon, Northrop Grumman. They all require NADCAP for special process suppliers. We're qualified.
✓
Process records back up every COC we signWe don't just generate paperwork. Every cert we issue ties back to a traveler with actual bath data, operator notes, and test results.
✓
Bath chemistry is analytically controlledWe test, adjust, and document our bath chemistry on a defined schedule. It's in the records if your auditor asks for it.
✓
We maintain corrective action recordsIssues get documented, root-caused, and closed. That's what the AC7004 cert requires. We keep those records.
ASL
Approved Supplier List Ready
Need cert copies for your supplier qualification file? We send them the same day you ask. We've done this dozens of times.
QML
Listed on eAuditNet
Both certs are on the PRI Qualified Manufacturers List. Your supply chain team can verify our status directly without calling us.
COC
Documentation Included on Every Order
COC, process records, test data. Organized. Available. Ready for your next source inspection or internal audit.
Qualifying Us as a Supplier?
We'll Make It Easy
Cert copies, supplier questionnaires, quality system documentation. Reach out and tell us what you need.
Questions about a process, a spec, or getting set up as a customer? Reach our team directly. We handle all new inquiries personally and know the shop well enough to give you a real answer.
Your Contact
Talk to a Real Person
No tickets. No automated responses. We pick up or call back.
For questions about our capabilities, certifications, or supplier qualification. Tell us what you're working on and we will follow up within one business day.
Fill in what you know. Don't have everything yet? Send what you have and we will work through the rest with you.
Quote Request Form
Tell Us About the Job
The more you share up front, the faster you get an accurate number back. Process, spec, material, quantity, and timeline are the big ones. Email drawings to colby@hhengcoatings.com after you submit.
Your Contact
Get in Touch
Want to talk through the job before submitting? Call or email Colby. He can usually give you a ballpark on the phone.
