| AISI | American Iron and Steel Institute |
| ANSI | American National Standards Institute |
| ASME | American Society of Mechanical Engineers |
| ASTM | American Society for Testing and Materials |
| BSI | British Standards Institution |
| DIN | Deutsches Institut fur Normung e.V. |
| IFI | Industrial Fasteners Institute |
| ISO | International Organization for Standardization |
| SAE | Society of Automotive Engineers |
| MAFDA | Mid Atlantic Fastener Distributors Association |