[ Nuts ]
Inconel 600 Heavy Hex Nuts
Patriot Bolt machines Inconel 600 heavy hex nuts from certified ASTM B166 bar (UNS N06600). Inconel 600 nuts pair with Inconel 600 studs so the whole joint resists hot oxidizing atmospheres and caustic service.
We make Inconel 600 nuts alone or with matching studs. Every order ships with mill test reports traceable to the heat.
[ Quick Specs ]
Inconel 600 Heavy Hex Nuts at a Glance
- Material
- Inconel 600, UNS N06600
- Bar specification
- ASTM B166 / ASME SB166
- Style
- Heavy hex to ASME B18.2.2
- Key elements
- 72% Ni min, 14–17% Cr, 6–10% Fe
- Matching stud
- Inconel 600 stud bolts
Why Engineers Specify Inconel 600 Nuts
- Same alloy as the stud. Matching nut and stud material gives the same expansion and corrosion behavior across the joint.
- Heat and caustic resistance. The nut sees the same hot or alkaline service as the stud.
- Galling. Like other nickel alloys, 600 can gall. Use a compatible anti-seize on assembly.
Inconel 600 Bar Properties
Nuts are machined from ASTM B166 bar, which sets these minimum properties.
| ASTM B166 condition and size | Tensile, min | Yield (0.2%), min | Elongation, min |
|---|---|---|---|
| Annealed (hot or cold worked), all sizes | 80 ksi | 35 ksi | 30% |
| Hot worked, rounds over 1/2 to 3 in | 90 ksi | 40 ksi | 25% |
| Hot worked, rounds over 3 in | 85 ksi | 35 ksi | 30% |
| Cold worked, rounds 1/2 to 1 in | 110 ksi | 85 ksi | 10% |
| Cold worked, rounds over 1 to 2-1/2 in | 105 ksi | 80 ksi | 12% |
Inconel 600 Chemical Composition
| Element | Weight % |
|---|---|
| Nickel (+ cobalt) | 72.0 min |
| Chromium | 14.0–17.0 |
| Iron | 6.0–10.0 |
| Carbon | 0.15 max |
| Manganese | 1.00 max |
| Silicon | 0.50 max |
| Copper | 0.50 max |
| Sulfur | 0.015 max |
Limits per the current edition of the specification. The mill test report for your heat is the controlling document.
Nut Styles
- Heavy hex nuts to ASME B18.2.2, the standard style for flange studs.
- Heavy hex jam nuts where a thinner nut is needed.
- Threads: UNC through 1 in and 8UN above 1 in, or the thread on your drawing.
Applications and Industries
- Heat treating and furnaces: Hot flanges and fixtures. See Industrial Manufacturing.
- Chemical processing: Caustic and alkaline service. See Petrochemical & Refining.
- Power generation: High-temperature joints. See Power Generation.
Certification and Traceability
Patriot Bolt is ISO 9001:2015 certified. Each Inconel 600 order includes mill test reports traceable to the heat, along with a certificate of conformance to the specification on your purchase order.
Nuts are marked with the material and our identification.
Compare Inconel 600 with other bolting grades in our Fastener Materials Matrix.
Inconel 600 Heavy Hex Nuts FAQ
Should Inconel 600 nuts be used with Inconel 600 studs?
Yes. Matching materials keep thermal expansion and corrosion resistance the same across the joint.
What bar specification is used?
ASTM B166 / ASME SB166, which covers UNS N06600 rod and bar.
Do Inconel 600 nuts gall?
They can, as with most nickel alloys. A compatible anti-seize reduces the risk.
Do you make matching Inconel 600 studs?
Yes. We machine Inconel 600 stud bolts, so the stud and nuts can come from one source.
Request a Quote
Send us the alloy, nut style, thread size, specification and quantity, or upload your drawing. Our team will confirm the material and lead time. Call (281) 581-0176 or request a quote.