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 7035-01-463-6559
NSN 5835-01-128-9331
NSN 6150-00-058-8669
NSN 5925-01-381-2528
NSN 6220-01-184-1851
NSN 5945-01-253-8168
NSN 5990-00-386-4951
NSN 5930-00-596-8115
NSN 6150-01-382-4983
NSN 5930-01-057-3222
NSN 2925-01-657-9741
NSN 5930-01-106-3377