Inconel 600 Heavy Hex NutASTM B166 · ASME B18.2.2 · Manufacturer, stockist & exporter, India
Alloy 600 · UNS N06600
An Inconel 600 heavy hex nut is a thicker and wider hexagon nut for pressure bolting, made from Inconel 600 to ASTM B166. Heavy hex nuts go with stud bolts on flanges. They spread load better and resist thread stripping at high preload. Made to ASME B18.2.2.
- ASTM B166
- ASME B18.2.2
- EN 10204 3.1 / 3.2
- Export packing
Reviewed by the Kanak Steel & Engineering Co. technical team · Updated October 2026
What is an Inconel 600 Heavy Hex Nut?
- What it is
- A thicker and wider hexagon nut for pressure bolting
- Material
- ASTM B166
- Dimensions
- ASME B18.2.2
- Grade
- Inconel 600 · UNS N06600
- Best at
- High-temperature oxidation, caustic and nuclear service
Inconel 600 Heavy Hex Nut Specification
| Product | Inconel 600 Heavy Hex Nut |
|---|---|
| Material standard | ASTM B166 |
| Dimensional standard | ASME B18.2.2 |
| Sizes | M10 – M64 · ½" – 4" (others on request) |
| Threads | UNC · UN-8 · metric coarse |
| Testing | PMI · dimensional · NDT and IGC on request |
| Documents | EN 10204 3.1 · 3.2 with third-party inspection |
When to Choose a Heavy Hex Nut
Heavy hex nuts go with stud bolts on flanges. They spread load better and resist thread stripping at high preload. Made to ASME B18.2.2.
- Thicker than standard hex nuts
- ASME B18.2.2
- Paired with A193 studs
More on choosing: Heavy hex nut guide.
Inconel 600 Heavy Hex Nut: Why 600 for heavy hex nuts
Heavy hex nuts go with stud bolts on flanges. They spread load better and resist thread stripping at high preload. Made to ASME B18.2.2. In Inconel 600, the choice usually comes down to the medium and temperature — the rows here are the points buyers check for this exact combination.
| Why this grade | Nickel-alloy fasteners match nickel-alloy flanges in corrosive or hot service. Inconel 600 is picked for high-temperature oxidation, caustic and nuclear service. |
|---|---|
| Typical service | Furnaces & heat treating — Muffles, retorts and radiant tubes. |
| Bolting | B7 (coated), B8M or nickel-alloy studs such as Inconel 600 from ASTM B166, as the project specifies |
Inconel 600 Heavy Hex Nut Chemical Composition
| Element | Weight % |
|---|---|
| Nickel (+Co) | 72.0 min |
| Chromium | 14.0 – 17.0 |
| Iron | 6.0 – 10.0 |
| Carbon | 0.15 max |
| Manganese | 1.0 max |
| Silicon | 0.5 max |
| Copper | 0.5 max |
| Sulphur | 0.015 max |
Inconel 600 Heavy Hex Nut Mechanical Properties
| Annealed plate | Value |
|---|---|
| Tensile strength | 550 MPa · 80 ksi |
| Yield strength 0.2% | 240 MPa · 35 ksi |
| Elongation | 30% |
Full chemistry, properties and equivalents are on the Inconel 600 grade page.
Standards on this page
Other Inconel 600 fasteners
Inconel 600 Heavy Hex Nuts for export
FOB / CIF · Nhava Sheva (JNPT), MumbaiInconel 600 Heavy Hex Nut — questions buyers ask
Why use heavy hex nuts on flanges?
They provide more thread engagement and bearing area for the high preload flange joints need.
What nut is used with Inconel 600 heavy hex nuts?
A nut in the same alloy, machined from ASTM B166 bar, unless the project specifies otherwise.
Which standard covers Inconel 600 heavy hex nuts?
The material is ASTM B166; dimensions follow ASME B18.2.2. Always state both on your purchase order, with the edition if your project specifies one.
What decides the price of a Inconel 600 heavy hex nut?
The alloy price, the size and dimensions, quantity, and the testing and documents required. Send your list and we quote the same working day.
What documents do you supply?
EN 10204 3.1 mill certificates as standard, 3.2 with third-party inspection on request, plus dimensional and PMI reports.
Sources: the ASTM / ASME specifications named on this page and producer datasheets · Last updated October 2026