MIL-C-81751B (NOTICE 1), MILITARY SPECIFICATION: COATING, METALLIC-CERAMIC (28 AUG 1996) [NO S/S DOCUMENT]., This notice should be filed in front of MIL-C-81751B, dated 17 January 1972, and Amendment 1,dated 12 January 1994.MIL-C-81751B is inactive for new design and is no longer used, except for replacement purposes.Product Code:SAE AMS3201 Title:Butadiene Acrylonitrile (NBR) Rubber, Dry Heat Resistant, 35 - 45 Issuing Committee:Ams Ce Elastomers Committee Scope:This specification covers a nitrile (NBR) rubber in the form of sheet, strip, tubing, extrusions, and molded shapes.These products have been typically used for parts, such as packings, bushings, grommets, and applications requiring resistance to dry heat, but usage is not limited to such applications. Each application should be considered individually.