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 5975-00-660-5962
NSN 6610-01-649-5326
NSN 5945-00-884-4760
NSN 5915-01-305-6516
NSN 5835-00-863-0959
NSN 5920-01-286-1215
NSN 5835-00-289-9080
NSN 6610-00-001-2517
NSN 5996-01-493-8373
NSN 5998-01-121-3830
NSN 5975-01-521-2863
NSN 6135-01-132-6310