Below is a comprehensive list of worldwide Nut dimension standards among ANSI, ASME, DIN, ISO, BS and Indian IS.
| Description | Standard | Measurement System |
|---|---|---|
| Hexagon Nuts | ANSI/ASME B18.2.2 | Inch Series |
| Square Nuts | ANSI/ASME B18.2.2 | Inch Series |
| Hex Nuts, Style 1 | ANSI/ASME B18.2.4.1M | Metric |
| Hex Nuts, Style 2 | ANSI/ASME B18.2.4.2M | Metric |
| Slotted Hex Nuts | ANSI/ASME B18.2.4.3M | Metric |
| Hex Flange Nuts | ANSI/ASME B18.4.4M | Metric |
| Hex Jam Nuts | ANSI/ASME B18.2.4.5M | Metric |
| Heavy Hex Nuts | ANSI/ASME B18.2.4.6M | Metric |
| Machine Screw Nuts | ANSI/ASME B18.6.3 | Inch Series |
| Prevailing Torque Hex Nuts | ANSI/ASME B18.16.3M | Metric |
| Prevailing Torque Hex Flange Nuts | ANSI/ASME B18.16.3M | Metric |
| Wing Nuts | DIN 315 / ISO 5448 | Metric |
| Hex Jam Nuts / Pipe Nuts | DIN 431 | Inch Series |
| Hexagon Thin Nuts / Jam Nuts | DIN 439/ ISO 4035 / ASME B18.2.4.5M | Metric |
| Hexagon Nuts | DIN 555 / ISO 4034 / UNI 82144 | Metric |
| Square Nuts | DIN 557 | Metric |
| Lifting Eye Nuts | DIN 582 | Metric |
| Spring Lock Washers, Form B | DIN 127B | Metric |
| Special Foundation Square Nuts | DIN 798 | Metric |
| Hexagon Nuts | DIN 934 / ISO 4032 / ASME B18.2.4.1M | Metric |
| Hexagon Castle Nuts | DIN 935 / ISO 7035 | Metric |
| Hex Jam Nuts / Thin Nuts | DIN 936 | Metric |
| Nylon Insert Lock Nuts / Nylock Nuts | DIN 985 / ISO 7040 / UNI 7474 | Metric |
| Dome Nylock Nuts | DIN 986 | Metric |
| Hexagon Domed Cap Nuts / Acorn Nuts | DIN 1587 / PN 82121 / UNI 5721 | Metric |
| Hexagon Nuts | DIN 2510 Form NF | Metric |
| Prevailing Torque Hexagon Thin Nuts | ISO 10511 | Metric |
| Prevailing Torque Hex Nuts | ISO 10512 | Metric |
| Prevailing Torque All Metal Hexagon High Nuts | ISO 10513 | Metric |
| Nuts for T-Slots | ISO 299 | Metric |
| Hexagon High Nuts | ISO 4033 | Metric |
| Hex Flange Nuts | ISO 4161 | Metric |
| Hex Nuts With Large Across Flats | ISO 4775 | Metric |
| Slotted Hexagon Castle Nuts, High Type | ISO 7036 | Metric |
| High Castle Nuts | ISO 7037 | Metric |
| Slotted Hexagon Castle Nuts, Low Type | ISO 7038 | Metric |
| Prevailing Torque Nuts with Nylon Insert / Prevailing Nyloc Nuts | ISO 7041 | Metric |
| Prevailing Torque All Metal Hexagon Nuts | ISO 7042 | Metric |
| Hexagon Nuts with Coarse & Fine Threads | ISO 8673 | Metric |
| Jam Nuts / Thin Hexagon Nuts With Fine Threads | ISO 8675 | Metric |
| Hexagon Nuts | IS 1363 Part 3 / ISO 4034 | Metric |
| Hexagon Nuts | IS 1364 Part 3 / ISO 4032 | Metric |
| Hexagon Nuts | BS 3692 | Metric |
| Hexagon Machine Screw Nuts | BS 4183 | Metric |
| Hexagon Nuts | BS 4190 | Metric |
| Hexagon Thin Nuts / Jam Nuts | BS 4190 | Metric |