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 6110-00-649-7313
NSN 6650-01-155-5217
NSN 5905-01-195-1437
NSN 5965-01-424-0542
NSN 5835-01-349-5420
NSN 6150-00-148-8515
NSN 6645-01-479-0804
NSN 6685-01-551-2412
NSN 6320-01-422-1212
NSN 6650-01-633-9147
NSN 5996-01-461-8897
NSN 5990-00-394-3987