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 5990-01-287-1682
NSN 5835-01-394-7589
NSN 6610-01-198-3862
NSN 5960-01-193-5224
NSN 5835-00-833-7080
NSN 7035-00-167-7411
NSN 5965-01-469-2054
NSN 5835-00-337-7801
NSN 5975-01-420-6591
NSN 5996-01-560-8971
NSN 5975-01-100-1822
NSN 6145-01-211-6135