If the US Government needs to make privately developed technical standards Federally enforceable, it will publish that information publicly. This includes some engineering standards. After they are referenced by the US Federal Code, they can be viewed. You can access these by the SIBR database or check out some of these pages:
This database provides information on standards that have been cited or incorporated by reference into the US Code of Federal Regulations (CFR). Includes information on how to obtain a copy of a standard. Alternatively, check with the standards publisher, a standards reseller or for a limited number of standards used in regulations, consult the American National Standards Institute (ANSI) Incorporated by Reference (IBR) Portal.
(from the Nist.gov, last updated 2/27/22)
Air-Conditioning, Heating, and Refrigeration Institute
American Institute of Aeronautics and Astronautics (AIAA) - Free to members
Consultative Committee on Space Data Systems (CCSDS)
European Telecommunications Standards Institute (ETSI) - Free standards; registration required
Internet Engineering Task Force (IETF)
Industrial Truck Standards Development Foundation
IPC Association - Some Free Standards
ISO/IEC Joint Technical Committee 1 (JTC1) - Approximately 200 JTC1 standards are available for free online
International Society of Automation (ISA) - Free to Members
International Telecommunication Union (ITU) Electronic Bookstore - 3 free ITU Recommendations on registration
Joint Electron Devices Engineering Council (JEDEC) - Free to members
National Fire Protection Association (NFPA) - Standards and codes free to view; registration required
National Information Standards Organization (NISO) - Some free standards
National Institute of Standards and Technology/Information Technology Laboratory
Organization for the Advancement of Structured Information Standards (OASIS)
Object Management Group, Inc. (OMG)
Process Industry Practices (PIP) - Free to members
RTCA Electronic Documents - Free to members
Society of Cable Telecommunication Engineers (SCTE)
Sporting Arms and Ammunition Manufacturers' Institute (SAAMI) - ANSI/SAAMI standards are available in electronic format free of charge; there is a nominal charge for hard copies.
Simulation Interoperability Standards Organization (SISO)
Simple Object Access Protocol (SOAP) 1.1
Underwriters Laboratories - standards are free to view
VITA Standards Organization - Free to members
