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 5925-01-625-9785
NSN 5965-01-055-0102
NSN 5965-01-408-5990
NSN 6135-01-574-6577
NSN 5910-01-421-2460
NSN 6130-00-017-9339
NSN 5895-01-260-1019
NSN 5990-01-193-0487
NSN 5998-01-575-3005
NSN 7035-01-107-2811
NSN 5945-01-486-3697
NSN 4140-00-718-6352