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 6620-01-138-8250
NSN 6145-01-437-7710
NSN 5925-01-378-6857
NSN 5905-00-555-1899
NSN 5996-01-284-1808
NSN 6135-01-633-8502
NSN 5905-00-358-1512
NSN 5935-01-123-9888
NSN 5835-01-593-7579
NSN 6645-00-989-2972
NSN 6110-00-881-2838
NSN 5910-01-174-6715