High-temperature stud bolts, nuts and custom fasteners for turbines, boilers, heat-recovery and balance-of-plant equipment, machined in Humble, Texas.
Power plant bolting runs hot and long between outages. Patriot Bolt manufactures studs, bolts and nuts to your drawing or specification in alloys chosen for the service temperature, and we can turn around replacements quickly when an outage schedule is tight.
B16 is a common choice for steam turbine and boiler bolting, 410 stainless for steam service where strength matters, and nickel alloys such as Inconel and Incoloy where heat and oxidation are the limit.
- Common specsA193 · A194
- High tempB16 · Incoloy 800
- Steam service410 (B6)
- Outage support24/7
- QualityISO 9001:2015
What we make for power generation
Stud Bolts
Full-thread, tap-end and double-end studs.
PB-02Nuts
Heavy hex and specialty nuts, graded to match.
PB-03Heavy Hex Bolts
Coarse and fine thread, alloy to nickel.
PB-0412-Point Flange Bolts
High-strength 12-point flange bolts.
PB-05Washers
Washers matched to the bolt and nut grade.
PB-06Custom & Specialty Fasteners
One-off specials to production runs, to print.
Common grades we machine
| MATERIAL | WHY IT IS USED |
|---|---|
| ASTM A193 B16 | Vanadium-bearing Cr-Mo alloy for steam turbine, boiler and high-temperature flange bolting. |
| ASTM A193 B7 | General flange bolting at moderate temperatures. |
| 410 (A193 B6) | Hardenable stainless for valves, pumps and steam service. |
| 321 (A193 B8T) | Titanium-stabilized stainless for heat-exposed assemblies. |
| Incoloy 800 / Inconel X-750 | Nickel alloys for high-temperature strength and oxidation resistance. |
| Hastelloy X | Superalloy for very high-temperature service. |
See all 30+ 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
What fastener material is used for steam turbine bolting?
ASTM A193 B16 is widely used because it holds strength at higher temperatures than B7. Nickel alloys are used for hotter service. We can recommend a grade from your operating conditions.
Can you make replacement studs from an old part?
Yes. Send a sample or drawing and we can reverse-engineer and machine replacements from certified round bar.
Can you support planned outages?
Yes. Send your bolting list ahead of the outage and our team will quote and schedule it, and we are on call 24/7 for surprises.
Send us the print.
Drawing, spec sheet, sample or part number. We will quote it fast.