MIL-P-5510, MILITARY STANDARD, PACKING, PREFORMED, STRAIGHT THREAD TUBE FITTING BOSS, TYPE I HYDRAULIC (-65 DEG. TO 160 DEG. F) (4 AUG 1977) [S/S BY SAE-AMS-P-5510]., This specification covers requirements for the material, design, testing and packaging of straight thread tube fitting boss packings.