- 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