Custom fasteners and precision machined components built to your print for aerospace, ground-support and test equipment, machined in Humble, Texas.
Aerospace work starts with the drawing. Patriot Bolt machines bolts, studs, nuts, shoulder bolts and specialty parts to your print and specification from certified round bar, with every bar traceable to its mill test report.
We work in high-strength alloy steels such as 4340, precipitation-hardening stainless steels such as 15-5 PH and 17-4 PH, and nickel superalloys such as Inconel 718 and X-750. Send your drawing and requirements and we will confirm material, certification and inspection needs at quote.
- Built toCustomer print
- Alloy steel4340 · 4140 HT
- PH stainless15-5 · 17-4
- SuperalloysInconel 718 · X-750
- TraceabilityMill test reports
What we make for aerospace
Custom & Specialty Fasteners
One-off specials to production runs, to print.
PB-02Shoulder Bolts
Shoulder bolts in alloy and stainless.
PB-03Socket Head Cap Screws
Socket head cap screws in alloy and stainless.
PB-04Stud Bolts
Full-thread, tap-end and double-end studs.
PB-05Nuts
Heavy hex and specialty nuts, graded to match.
PB-06Fastener Coatings
PTFE, zinc, cadmium, zinc-nickel and more.
Common grades we machine
| MATERIAL | WHY IT IS USED |
|---|---|
| 4340 HT | Ni-Cr-Mo alloy with deep hardenability, used for aerospace ground support and high-strength fasteners. |
| 15-5 PH / 17-4 PH | Precipitation-hardening stainless steels that combine high strength with corrosion resistance. |
| Inconel 718 | Age-hardenable nickel superalloy for high strength at elevated temperature. |
| Inconel X-750 | Nickel superalloy for high-temperature springs and fasteners. |
| 321 | Stabilized stainless for exhaust and heat-exposed assemblies. |
| Hastelloy X | Superalloy for very high-temperature service. |
See all 90+ grades in the Fastener Materials Matrix. Not sure which fits? Send the service temperature, pressure, media and any customer specification and we will recommend one.
Built to spec. Made in Texas.
Common questions
Can you machine aerospace fasteners to our drawing?
Yes. We machine to customer prints from certified round bar. Send the drawing and specification, and we will confirm material, certification and inspection requirements when we quote.
Which materials do you machine for aerospace work?
Common grades include 4340, 4140 HT, 15-5 PH, 17-4 PH, Inconel 718 and Inconel X-750. See the Fastener Materials Matrix for the full list.
Do you offer coatings suited to aluminum assemblies?
We offer several coatings. Cadmium, for example, offers galvanic compatibility with aluminum. See our fastener coatings page.
Send us the print.
Drawing, spec sheet, sample or part number. We will quote it fast.