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 5855-01-244-9785
NSN 5960-01-265-0354
NSN 4140-00-127-5311
NSN 5960-01-535-1743
NSN 5855-01-187-2293
NSN 5960-00-167-7875
NSN 5935-00-839-4094
NSN 5990-01-507-7495
NSN 6150-01-312-4470
NSN 6320-01-384-3850
NSN 5835-01-063-4920
NSN 2925-00-149-0760