This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement.
SAE AMS3901/4-1974 history
2014SAE AMS3901/4D-2014 Yarn, Organic Fiber (Para-Aramid), High Modulus 1420 Denier (1580 d tex), 0.6% Finish