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 5975-01-588-2308
NSN 6220-01-306-0904
NSN 6650-01-107-7553
NSN 6220-01-019-4090
NSN 5925-01-220-9555
NSN 6135-01-071-4923
NSN 5985-01-125-6788
NSN 6320-01-279-0343
NSN 6150-00-926-0802
NSN 5930-01-591-2533
NSN 5915-01-474-6197
NSN 5910-00-929-8973