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 6220-01-231-7601
NSN 6105-01-410-8948
NSN 5915-01-430-4599
NSN 6620-00-983-4171
NSN 5925-01-459-6955
NSN 6130-01-044-9496
NSN 5835-01-561-2959
NSN 5905-01-471-1924
NSN 5925-00-275-7599
NSN 6105-01-285-8204
NSN 6650-00-864-2942
NSN 5855-00-237-4088