A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 5915-01-298-8966
NSN 5950-01-310-8570
NSN 6685-01-416-0106
NSN 6240-01-347-5476
NSN 6145-01-657-2833
NSN 5905-00-324-7278
NSN 5935-01-520-4544
NSN 6685-00-447-6436
NSN 4140-01-470-2599
NSN 5945-01-400-1145
NSN 6645-00-780-5260
NSN 6650-01-491-0858