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 7035-01-451-1618
NSN 4140-00-648-3303
NSN 5835-00-334-6556
NSN 6150-00-205-2490
NSN 6135-01-195-5343
NSN 5965-01-060-0904
NSN 6320-01-140-1763
NSN 5945-01-106-3472
NSN 5895-01-472-7673
NSN 6135-01-113-1507
NSN 6105-01-644-8962
NSN 5935-01-328-7385