Illustrative drawing. Actual product is confirmed to your specification at quotation.
Nuts
Heavy Hex Nuts
Heavy hex nuts have a larger width across flats and greater thickness than regular hex nuts, giving more thread engagement for high-strength studs and flange bolting. The usual pairing is ASTM A194 grade 2H with A193 B7 studs.
- Extra thickness for thread engagement
- Pairs with A193 B7 studs
- Plain, galvanised or fluoropolymer coated
Specifications
- Material
- Carbon steelAlloy steelStainless steel A2 (AISI 304)Stainless steel A4 (AISI 316)
- Grade / property class
- ASTM A194 2HASTM A563 Grade CASTM A563 Grade DHASTM A194 Grade 8 / 8M
- Thread
- UNC / UNF (imperial)Metric coarse (ISO 261)
- Finish / coating
- Plain / blackZinc platedHot-dip galvanisedFluoropolymer coated (on request)
- Size range
- M8–M12M14–M24M27–M48Above M48Imperial (inch)
- Standards
- ASTM A194 Grade 2HASTM A563 Grades C, DHASME B18.2.2
Exact dimensions, lengths and availability are confirmed at quotation.
Applications
- Flange and pressure-vessel bolting
- Refineries and petrochemical plants
- Power plant equipment
- Heavy structural joints
- Pipework and valve bonnets
Related and complementary fasteners
Request a quote for Heavy Hex Nuts
Give us the size, grade, finish and quantity. We reply within one business day.
Common questions
- Which sizes and grades of heavy hex nuts do you supply?
- We supply heavy hex nuts in M8–M12, M14–M24, M27–M48, Above M48, Imperial (inch) size bands and grades/classes including ASTM A194 2H, ASTM A563 Grade C, ASTM A563 Grade DH, ASTM A194 Grade 8 / 8M. Exact availability, dimensions and lead time are confirmed at quotation.
- Which standards do heavy hex nuts follow?
- Common standards are ASTM A194 Grade 2H, ASTM A563 Grades C, DH, ASME B18.2.2. Tell us the standard you need and we will quote to it.
- Can you supply in bulk or with test certificates?
- Yes. We quote for loose lots and scheduled bulk supply across India, and can share manufacturer test certificates where available. Confirm the requirement when you request a quote.
Need a quote on bulk or custom industrial supply?
Share your specifications and quantities — our technical team will respond with pricing and lead time within one business day.