Product Code:SAE AMS3904/2 Title:Yarn, Organic Fiber (Para-Aramid), Intermediate Modulus, 400 Denier, 1.75% Finish Issuing Committee:Ams P Polymeric Materials Committee Scope: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.