Representing domestic manufacturers of welded and weldless chain since 1933. Our members provide a wide range of chain products such as tire chain, Grade 80 and Grade 100 chain, galvanized chain, stainless steel chain, double loop chain, décor chain, and tow chain.
As one of the oldest industrial trade associations in the USA, NACM provides specifications to a wide array of other American industries. The NACM member firms are defined as companies that have been manufacturing chain in the United States for a period of at least two years. Most of the members have been in business a lot longer than eight decades; several have been making chains for more than a century.
In addition to working with the Tire and Rim Association in Ohio, NACM opened and continuously maintained a dialog with the Association for Testing and Materials (now ASTM International) in Pennsylvania and with the Society of Automobile Engineers (now SAE International) in Michigan. Following the lead of ASTM, a voluntary consensus practice was adopted to review and/or revise all NACM specifications at intervals of five years or sooner. This practice permits recognition of advances in technology which tend to grow outward from sole-source innovations into multi-source products.
Although activities of the U.S. DOC Bureau of Standards were changed as a result of American efforts to create ISO standards for international use, the establishment of the American Standards Association (now ANSI) also adhered to the protocols of ASTM with regard to voluntary, non-governmental standards.
Today, NACM maintains an interface with several other federal agencies:
DOL – Occupational Safety and Health Administration (OSHA)
DOT – Federal Motor Carrier Safety Administration (FMCSA)
DLA – U.S. Defense Logistics Agency
In 2012, NACM sponsored a meeting in Virginia with DLA and other interested parties to work on the latest revisions of RR-C-271.
The NACM model specification for tire chains is recognized by several state and local governments. Other NACM model specifications for welded chain and weldless chain are mentioned, cited, or adopted by such groups as:
American Association of Railroads (AAR)
American Iron & Steel Institute (AISI)
American Society of Mechanical Engineers (ASME)
Associated Wire Rope Fabricators (AWRF)
Commercial Vehicle Safety Alliance (CVSA)
National Association of Trailer Manufacturers (NATM)
Web Sling & Tiedown Association (WSTDA)