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 5990-00-997-8945
NSN 5835-01-408-2503
NSN 6110-00-287-3235
NSN 5835-01-515-6537
NSN 5920-00-535-9398
NSN 5975-01-065-0467
NSN 5855-01-236-9645
NSN 5985-01-059-5727
NSN 2925-01-187-5480
NSN 5998-00-904-2619
NSN 6620-00-202-5122
NSN 2925-01-299-6967