- AISI: American Iron and Steel Institute https://www.steel.org/steel-markets/automotive
- ANSI: American National Standards Institute https://www.ansi.org/
- ASME: American Society of Mechanical Engineers https://www.asme.org/
- ASTM: American Society for Testing and Materials https://www.astm.org/
- BSI: British Standards Institution https://www.bsigroup.com/en-GB/
- DIN: Deutsches Institut fur Normung e.V. https://www.din.de/en
- IFI: Industrial Fasteners Institute https://www.indfast.org/
- ISO: International Organization for Standardization https://www.iso.org/home.html
- SAE: Society of Automotive Engineers https://www.sae.org/
- MAFDA: Mid Atlantic Fastener Distributors Association https://www.mafda.com/