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 5855-01-658-4510
NSN 6220-01-016-1776
NSN 6220-01-507-0882
NSN 5910-01-255-2480
NSN 6220-01-104-3006
NSN 6105-01-165-3823
NSN 2925-01-197-7864
NSN 5935-01-415-4468
NSN 5985-00-403-4145
NSN 6105-01-437-9661
NSN 6130-01-322-7150
NSN 5950-01-437-9051