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 6320-01-384-3850
NSN 7035-01-332-9582
NSN 5930-01-123-5243
NSN 5895-01-004-9861
NSN 6105-01-121-0520
NSN 6220-00-026-4800
NSN 6320-00-681-1324
NSN 6145-01-076-0899
NSN 5930-00-475-1500
NSN 5945-01-558-8487
NSN 5915-00-493-6500
NSN 5855-01-454-0704