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 6685-01-383-7499
NSN 5975-01-464-2867
NSN 5920-00-064-2375
NSN 6220-01-090-0126
NSN 7035-01-364-0286
NSN 2925-01-122-7812
NSN 5996-01-502-9215
NSN 5945-00-030-2003
NSN 6130-01-394-4986
NSN 5835-01-632-6627
NSN 5920-01-487-7846
NSN 5985-01-373-5123