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 6105-01-296-7048
NSN 5920-01-534-0393
NSN 5985-01-350-3823
NSN 5910-01-026-9587
NSN 5998-00-400-5925
NSN 2925-00-682-5028
NSN 6240-01-490-6922
NSN 6145-01-558-5017
NSN 7035-01-423-8343
NSN 5945-01-519-8887
NSN 6645-01-528-4621
NSN 5965-00-194-9428