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 5930-00-111-2727
NSN 5975-01-089-9053
NSN 4140-01-237-1509
NSN 5915-00-901-1246
NSN 4140-01-481-3587
NSN 6610-01-323-7045
NSN 5915-01-391-7830
NSN 5975-01-439-5497
NSN 5925-01-232-6049
NSN 6650-01-216-2707
NSN 6685-01-152-2846
NSN 5945-00-149-1857