PRODUCTHeavy Hex Nut ASTM A563 Carbon Steel Fastener for Structural Steel and Construction
ASTM A563 Heavy Hex Nuts are carbon steel fastening components for structural steel, construction, and heavy-duty bolted connections. They are suitable for matching stud bolts and structural fastener assemblies with inch thread requirements.
- Standard
- ASTM A563
- Material
- Carbon Steel
Product Details
Heavy Hex Nuts have a larger hexagonal profile for structural steel and construction fastening applications. This product is supplied as ASTM A563 carbon steel and is suitable for heavy-duty bolt and stud connections. The dimensional reference follows ASME B18.2.2 Table 10. Standard inch thread sizes range from 1-1/8" to 4", with UNC, UNF, and 8-UN thread options according to the selected size.

Product Specifications
| Item | Details |
|---|---|
| Product Name | Heavy Hex Nut |
| Standard | ASTM A563 |
| Dimensional Reference | ASME B18.2.2 Table 10 |
| Product Type | Heavy Hex Nut |
| Material | Carbon Steel |
| Thread Series | UNC / UNF / 8-UN |
| Standard Thread Size Range | 1-1/8"–4" |
| Key Dimensions | Across Flats, Across Corners, Nut Height, and Heavy Nut Dimensions |
| Matching Product | Stud Bolts and Structural Bolts |
| Main Applications | Structural Steel, Construction, Heavy-Duty Bolt Connections |
| Customization | Custom sizes available |
| Packaging | Carton or Bag Packing |
ASME B18.2.2 Dimension Reference
| Thread Size | UNC | UNF | 8-UN | Width across flats s Nom. | Width across corners e Min. | Width across corners e Max. | Nut height m Nom. | Nut height m Min. | Nut height m Max. |
|---|---|---|---|---|---|---|---|---|---|
| 1-1/8" | 7 | 12 | 8 | 1-13/16" | 2.002" | 2.093" | 1-1/8" | 1.079" | 1.155" |
| 1-1/4" | 7 | 12 | 8 | 2" | 2.209" | 2.309" | 1-1/4" | 1.187" | 1.282" |
| 1-3/8" | 6 | 12 | 8 | 2-3/16" | 2.416" | 2.526" | 1-3/8" | 1.310" | 1.409" |
| 1-1/2" | 6 | 12 | 8 | 2-3/8" | 2.622" | 2.742" | 1-1/2" | 1.433" | 1.536" |
| 1-3/4" | 5 | — | 8 | 2-3/4" | 3.035" | 3.175" | 1-3/4" | 1.679" | 1.790" |
| 2" | 4-1/2 | — | 8 | 3-1/8" | 3.449" | 3.608" | 2" | 1.925" | 2.044" |
| 2-1/4" | 4-1/2 | — | 8 | 3-1/2" | 3.862" | 4.041" | 2-1/4" | 2.155" | 2.298" |
| 2-1/2" | 4 | — | 8 | 3-7/8" | 4.275" | 4.474" | 2-1/2" | 2.401" | 2.552" |
| 2-3/4" | 4 | — | 8 | 4-1/4" | 4.688" | 4.907" | 2-3/4" | 2.647" | 2.806" |
| 3" | 4 | — | 8 | 4-5/8" | 5.102" | 5.340" | 3" | 2.893" | 3.060" |
| 3-1/4" | 4 | — | 8 | 5" | 5.515" | 5.774" | 3-1/4" | 3.124" | 3.314" |
| 3-1/2" | 4 | — | 8 | 5-3/8" | 5.928" | 6.207" | 3-1/2" | 3.370" | 3.568" |
| 3-3/4" | 4 | — | 8 | 5-3/4" | 6.341" | 6.640" | 3-3/4" | 3.616" | 3.822" |
| 4" | 4 | — | 8 | 6-1/8" | 6.755" | 7.073" | 4" | 3.862" | 4.076" |
Carbon Steel Heavy Hex Nut for Structural Steel
ASTM A563 Carbon Steel Heavy Hex Nuts are suitable for structural steel and construction fastening applications. The heavy hex profile provides a larger nut size for heavy-duty bolt and stud assemblies. Buyers can select the required thread size, thread series, matching bolt or stud specification, and quantity according to the structural connection requirement.
Customization Available
Custom sizes are available for ASTM A563 Heavy Hex Nuts. Buyers can provide their required thread size, thread series, nut dimensions, matching bolt or stud specification, quantity, and application details for quotation.
Applications
ASTM A563 Carbon Steel Heavy Hex Nuts are suitable for:
Structural steel connections
Construction installation
Heavy-duty bolt assemblies
Stud bolt connections
Steel frame and support systems
General industrial structural fastening

Information Needed for a Quote
To prepare a quotation, please provide:
Required standard: ASTM A563
Required thread size: 1-1/8" to 4"
Required thread series: UNC, UNF, or 8-UN
Matching bolt or stud specification
Required quantity
Application type
Custom size requirement, if applicable
FAQ
1.What is the standard for this Heavy Hex Nut?
This product is supplied to ASTM A563.
2.What material is available?
Carbon steel.
3.What size range is available?
The standard inch thread size reference covers 1-1/8" to 4".
4.What thread types are available?
UNC, UNF, and 8-UN thread series are available according to the selected size.
5.What applications is this product suitable for?
It is suitable for structural steel, construction, heavy-duty bolt connections, and matching stud bolt assemblies.
6.Can I request customized sizes?
Yes. Custom sizes are available according to the required thread size, thread series, nut dimension, matching bolt or stud specification, and quantity.
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