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 5925-01-563-5534
NSN 5960-00-289-6591
NSN 5996-01-028-6047
NSN 6145-01-013-4068
NSN 5998-01-408-8942
NSN 6645-00-235-4685
NSN 5895-01-394-7138
NSN 6145-01-564-2518
NSN 6150-01-013-9492
NSN 5960-00-588-8966
NSN 6650-01-044-6377
NSN 6645-00-279-1777