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 5945-00-061-7651
NSN 6145-00-013-9939
NSN 5910-01-147-8082
NSN 4140-01-502-5601
NSN 6320-01-086-2602
NSN 6145-00-822-0562
NSN 5905-00-488-6324
NSN 6320-00-194-4252
NSN 6105-01-492-5723
NSN 6620-00-212-6921
NSN 7035-01-013-9889
NSN 5945-01-464-4339