On this page 5 sections
Key features of heavy hex nuts
- ASME B18.2.2 dimensions
- ASTM A194 grades
- Matched to stud grade
- Plain or coated
Heavy Hex Nuts by material
Heavy Hex Nuts are available in the following grades. Select a grade for specifications and sizes.
Stainless Steel
- SS 304 Heavy Hex Nuts
- SS 316 Heavy Hex Nuts
- SS 316L Heavy Hex Nuts
- SS 321 Heavy Hex Nuts
- SS 347 Heavy Hex Nuts
- SS 410 Heavy Hex Nuts
- SS 904L Heavy Hex Nuts
- Duplex 2205 Heavy Hex Nuts
- Super Duplex 2507 Heavy Hex Nuts
Nickel Alloys
- Inconel 600 Heavy Hex Nuts
- Inconel 625 Heavy Hex Nuts
- Inconel 718 Heavy Hex Nuts
- Incoloy 800 Heavy Hex Nuts
- Incoloy 825 Heavy Hex Nuts
- Monel 400 Heavy Hex Nuts
- Monel K-500 Heavy Hex Nuts
- Hastelloy C22 Heavy Hex Nuts
- Hastelloy C276 Heavy Hex Nuts
Non-Ferrous Metals
Heavy Hex Nuts: sizes, finishes and testing
- Size range
- M6 – M100 and ¼" – 4"; heavy hex to ASME B18.2.2; metric to ISO 4032 / 4033
- Finish
- Plain, zinc, galvanised (tapped oversize), fluoropolymer
Testing & documents
- Proof-load tests
- Hardness tests
- Chemical analysis
- EN 10204 3.1 certificate; 3.2 with third-party inspection
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Other nuts types
Frequently asked questions
What sizes are heavy hex nuts available in?
M6 – M100 and ¼" – 4"; heavy hex to ASME B18.2.2; metric to ISO 4032 / 4033.
Which specifications cover heavy hex nuts?
ASME B18.2.2 dimensions.
What are heavy hex nuts used for?
ASTM A194 grades. ASTM A194 grades (2H, 2HM, 4, 7, 8, 8M) are matched to the stud material.
Which materials are heavy hex nuts available in?
Stainless steel, nickel alloys, carbon and alloy steel and non-ferrous metals, depending on the specification. See the material list above.