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 5999-01-391-4996
NSN 6240-00-132-0955
NSN 6220-00-895-5902
NSN 5895-00-815-7905
NSN 5975-01-172-7337
NSN 5920-01-115-4335
NSN 4140-01-452-6933
NSN 5990-00-197-0159
NSN 5945-01-150-1018
NSN 4140-01-429-9060
NSN 6320-00-004-9158
NSN 6685-01-260-9156