Precision-Machined Special Metal Nuts
High-performance nuts designed for perfect thread integrity and secure locking in extreme environments.
Nut Types and Fastening Applications
ATX offers a comprehensive range of high-strength special metal nuts, including hex nuts, heavy hex nuts, flange nuts, cap nuts, and stud bolt nuts. Each nut is designed to deliver reliable fastening performance, thread integrity, and load distribution across structural and industrial applications. Manufactured to meet demanding service conditions, these nuts support secure assembly in pressure, vibration, and corrosive environments.
Available Materials
Hex Nut
A standard hexagonal nut used with bolts or studs to secure fastened joints in structural and industrial applications.
| Nominal Diameter (M) | Thread Pitch (P) | Width Across Flats (B) | Nut Thickness (m) |
|---|---|---|---|
| M3 | 0.5 | 5.5 | 2.4 |
| M4 | 0.7 | 7 | 3.2 |
| M5 | 0.8 | 8 | 4 |
| M6 | 1 | 10 | 5 |
| M8 | 1.25 | 13 | 6.5 |
| M10 | 1.5 | 17 | 8 |
| M12 | 1.75 | 19 | 10 |
| M14 | 2 | 22 | 11 |
| M16 | 2 | 24 | 13 |
| M18 | 2.5 | 27 | 15 |
| M20 | 2.5 | 30 | 16 |
| M22 | 2.5 | 32 | 18 |
| M24 | 3 | 36 | 19 |
| M27 | 3 | 41 | 22 |
| M30 | 3.5 | 46 | 24 |
| M33 | 3.5 | 50 | 26 |
| Nominal Size | Thread | Pitch (TPI) | Width Across Flats (AF) | Thickness |
|---|---|---|---|---|
| 1/4" | UNC / UNF | 20 / 28 | 7/16" | 7/32" |
| 5/16" | UNC / UNF | 18 / 24 | 1/2" | 1/4" |
| 3/8" | UNC / UNF | 16 / 24 | 9/16" | 5/16" |
| 7/16" | UNC / UNF | 14 / 20 | 5/8" | 11/32" |
| 1/2" | UNC / UNF | 13 / 20 | 3/4" | 7/16" |
| 5/8" | UNC / UNF | 11 / 18 | 15/16" | 9/16" |
| 3/4" | UNC / UNF | 10 / 16 | 1-1/8" | 21/32" |
| 7/8" | UNC / UNF | 9 / 14 | 1-5/16" | 3/4" |
| 1" | UNC / UNF | 8 / 12 | 1-1/2" | 7/8" |
| 1-1/8" | UNC / UNF | 7 / 12 | 1-11/16" | 31/32" |
| 1-1/4" | UNC / UNF | 7 / 12 | 1-7/8" | 1-1/16" |
| 1-1/2" | UNC / UNF | 6 / 12 | 2-1/4" | 1-5/16" |
| Classification | International Standards |
|---|---|
| ISO | ISO 4032 |
| DIN | DIN 934 |
| JIS | JIS B 1181 |
| KS | KS B 1012 |
| ANSI / ASME | ASME B18.2.2 |
| BS | BS 3692 |
Heavy Hex Nut
A heavy hexagonal nut designed for high-strength fastening, commonly used with bolts or studs in structural and industrial applications.
| Nominal Diameter (M) | Thread Pitch (P) | Width Across Flats (B) | Nut Thickness (m) |
|---|---|---|---|
| M12 | 1.75 | 22 | 12 |
| M16 | 2 | 30 | 16 |
| M20 | 2.5 | 34 | 20 |
| M22 | 2.5 | 36 | 22 |
| M24 | 3 | 41 | 24 |
| M27 | 3 | 46 | 27 |
| M30 | 3.5 | 50 | 30 |
| M33 | 3.5 | 55 | 33 |
| M36 | 4 | 60 | 36 |
| Nominal Size | Thread | Pitch (TPI) | Width Across Flats (AF) | Thickness |
|---|---|---|---|---|
| 1/2" | UNC / UNF | 13 / 20 | 7/8" | 1/2" |
| 5/8" | UNC / UNF | 11 / 18 | 1" | 5/8" |
| 3/4" | UNC / UNF | 10 / 16 | 1-1/8" | 3/4" |
| 7/8" | UNC / UNF | 9 / 14 | 1-5/16" | 7/8" |
| 1" | UNC / UNF | 8 / 12 | 1-1/2" | 1" |
| 1-1/8" | UNC / UNF | 7 / 12 | 1-11/16" | 1-1/8" |
| 1-1/4" | UNC / UNF | 7 / 12 | 1-7/8" | 1-1/4" |
| 1-3/8" | UNC / UNF | 6 / 12 | 2-1/16" | 1-3/8" |
| 1-1/2" | UNC / UNF | 6 / 12 | 2-1/4" | 1-1/2" |
| Classification | International Standards |
|---|---|
| ISO | ISO 4033 |
| DIN | DIN 6915 |
| ASTM | ASTM A563 (Heavy Hex) |
| ANSI / ASME | ASME B18.2.2 |
| BS | BS EN 14399 |
Stud Bolt Nut
A nut used with stud bolts to secure flanged joints in pressure vessels, piping systems, and industrial assemblies.
| Nominal Diameter (M) | Thread Pitch (P) | Width Across Flats (B) | Nut Thickness (m) |
|---|---|---|---|
| M12 | 1.75 | 19 | 10 |
| M16 | 2 | 24 | 13 |
| M20 | 2.5 | 30 | 16 |
| M22 | 2.5 | 32 | 18 |
| M24 | 3 | 36 | 19 |
| M27 | 3 | 41 | 22 |
| M30 | 3.5 | 46 | 24 |
| M33 | 3.5 | 50 | 26 |
| M36 | 4 | 55 | 29 |
| Nominal Diameter (M) | Thread Pitch (P) | Width Across Flats (B) | Nut Thickness (m) |
|---|---|---|---|
| M12 | 1.75 | 22 | 12 |
| M16 | 2 | 30 | 16 |
| M20 | 2.5 | 34 | 20 |
| M22 | 2.5 | 36 | 22 |
| M24 | 3 | 41 | 24 |
| M27 | 3 | 46 | 27 |
| M30 | 3.5 | 50 | 30 |
| M33 | 3.5 | 55 | 33 |
| M36 | 4 | 60 | 36 |
| Classification | International Standards |
|---|---|
| ISO | ISO 4032 / ISO 4033 |
| DIN | DIN 934 / DIN 6915 |
| ASTM | ASTM A194 |
| ASME | ASME B18.2.2 |
| BS | BS 4882 |
Cap Nut
A hexagonal nut with a closed end, used to protect exposed threads while providing a clean finish and secure fastening.
| Nominal Diameter (M) | Thread Pitch (P) | Width Across Flats (B) | Total Height (h) | Dome Height (h1) |
|---|---|---|---|---|
| M4 | 0.7 | 7 | 8 | 3 |
| M5 | 0.8 | 8 | 10 | 4 |
| M6 | 1 | 10 | 12 | 5 |
| M8 | 1.25 | 13 | 15 | 6 |
| M10 | 1.5 | 17 | 18 | 8 |
| M12 | 1.75 | 19 | 22 | 10 |
| M14 | 2 | 22 | 25 | 11 |
| M16 | 2 | 24 | 28 | 13 |
| M18 | 2.5 | 27 | 30 | 14 |
| M20 | 2.5 | 30 | 32 | 15 |
| Classification | International Standards |
|---|---|
| ISO | ISO 1587 |
| DIN | DIN 1587 |
| JIS | JIS B 1181 |
| ANSI / ASME | ASME B18.2.2 |
| BS | BS 3692 |
Flange Nut
A nut with an integrated flange that distributes load evenly, reducing surface damage and improving fastening stability.
| Nominal Diameter (M) | Thread Pitch (P) | Width Across Flats (B) | Nut Thickness (m) | Flange Diameter (df) |
|---|---|---|---|---|
| M5 | 0.8 | 8 | 5 | 11.8 |
| M6 | 1 | 10 | 6 | 14.2 |
| M8 | 1.25 | 13 | 8 | 17.9 |
| M10 | 1.5 | 17 | 10 | 21.8 |
| M12 | 1.75 | 19 | 12 | 26 |
| M14 | 2 | 22 | 14 | 30 |
| M16 | 2 | 24 | 16 | 33.5 |
| M18 | 2.5 | 27 | 18 | 37 |
| M20 | 2.5 | 30 | 20 | 40.5 |
| M22 | 2.5 | 32 | 22 | 44 |
| M24 | 3 | 36 | 24 | 48 |
| Nominal Size | Thread | Pitch (TPI) | Width Across Flats (AF) | Overall Height |
|---|---|---|---|---|
| 1/4" | UNC / UNF | 20 / 28 | 7/16" | 0.406 |
| 5/16" | UNC / UNF | 18 / 24 | 1/2" | 0.5 |
| 3/8" | UNC / UNF | 16 / 24 | 9/16" | 0.594 |
| 7/16" | UNC / UNF | 14 / 20 | 5/8" | 0.688 |
| 1/2" | UNC / UNF | 13 / 20 | 3/4" | 0.781 |
| 5/8" | UNC / UNF | 11 / 18 | 15/16" | 0.938 |
| 3/4" | UNC / UNF | 10 / 16 | 1-1/8" | 1.094 |
| 7/8" | UNC / UNF | 9 / 14 | 1-5/16" | 1.25 |
| 1" | UNC / UNF | 8 / 12 | 1-1/2" | 1.406 |
| Nominal Size | Thread | Pitch (TPI) | Width Across Flats (AF) | Thickness | Flange Diameter |
|---|---|---|---|---|---|
| 1/4" | UNC / UNF | 20 / 28 | 7/16" | 1/4" | 0.625 |
| 5/16" | UNC / UNF | 18 / 24 | 1/2" | 5/16" | 0.688 |
| 3/8" | UNC / UNF | 16 / 24 | 9/16" | 3/8" | 0.812 |
| 7/16" | UNC / UNF | 14 / 20 | 5/8" | 7/16" | 0.938 |
| 1/2" | UNC / UNF | 13 / 20 | 3/4" | 1/2" | 1.062 |
| 5/8" | UNC / UNF | 11 / 18 | 15/16" | 5/8" | 1.312 |
| 3/4" | UNC / UNF | 10 / 16 | 1-1/8" | 3/4" | 1.562 |
| 7/8" | UNC / UNF | 9 / 14 | 1-5/16" | 7/8" | 1.812 |
| 1" | UNC / UNF | 8 / 12 | 1-1/2" | 1" | 2.062 |
| Classification | International Standards |
|---|---|
| ISO | ISO 4161 |
| DIN | DIN 6923 |
| JIS | JIS B 1181 |
| ANSI / ASME | ASME B18.2.2 |
| BS | BS 3692 |
Custom Machined Nut
A custom machined nut manufactured to precise specifications, supporting specialized fastening requirements where standard nuts are not suitable.
For geometries, dimensions, materials, or application conditions that cannot be addressed by standard specifications, custom machined bolts can be manufactured based on customer requirements and project specifications.
Material Grades & Applicable Standards
Many customers have already been using it reliably for a long time.
Inquiry CTA
For detailed availability, lead time, and quotation,
please contact us with your required specifications.