Form: This specification covers one type of organic (para-aramid) 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. Classification: Organic fiber 1500 denier (1670 dtex) yarn with 20.9 gpd (184.5 cN/tex) nominal tensile strength and 575 gpd (5075 cN/tex) nominal tensile modulus with no finish for use in cables and cordage requiring high tensile strength and moderate modulus of elasticity in tension.