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 6620-00-181-6391
NSN 5915-01-016-6341
NSN 5950-01-145-9523
NSN 6145-00-234-0251
NSN 5915-00-569-1434
NSN 6610-01-519-7297
NSN 4140-01-631-1896
NSN 6645-01-318-1874
NSN 6685-01-422-1571
NSN 6645-01-422-3510
NSN 5935-01-123-9151
NSN 4140-01-022-6912