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 5910-01-481-3464
NSN 5990-01-571-3593
NSN 5985-01-167-8205
NSN 5910-01-622-1952
NSN 5855-00-327-2112
NSN 7035-01-013-9889
NSN 7035-01-592-7303
NSN 5905-01-006-5141
NSN 4140-00-968-7367
NSN 6650-01-359-5385
NSN 5855-01-645-8185
NSN 6145-01-512-2308