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 AMS3901/4C-1998 history
1998SAE AMS3901/4C-1998 Yarn, Organic Fiber (Para-Aramid), High Modulus OY 390 (2689)/23.8 Tensile Strength, 16.5 (114)/955 Tensile Modulus 1420 Denier, (1580 d tex), 0.6% Finish