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 5835-01-119-8561
NSN 5975-00-432-5526
NSN 7035-01-358-8361
NSN 5945-01-138-7264
NSN 4140-00-983-8048
NSN 5905-01-025-3838
NSN 6645-01-526-0379
NSN 5910-01-331-2792
NSN 5998-01-422-2615
NSN 5925-01-210-9765
NSN 5996-01-171-2132
NSN 6150-01-603-7757