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 5915-01-600-1058
NSN 6685-01-587-6792
NSN 5835-00-454-7239
NSN 6620-01-294-1044
NSN 5910-00-378-3149
NSN 5910-00-263-3630
NSN 5910-00-230-8982
NSN 6645-00-353-6659
NSN 5975-01-097-9023
NSN 5945-01-263-7751
NSN 6145-01-078-6022
NSN 6645-01-005-5915