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 5925-00-231-8668
NSN 5960-00-915-6269
NSN 5975-00-500-0166
NSN 5998-01-660-0974
NSN 5975-01-251-7567
NSN 5855-01-180-5369
NSN 5985-01-546-9010
NSN 6220-00-948-0466
NSN 6240-01-007-6870
NSN 5985-01-503-0146
NSN 6130-01-250-9162
NSN 5996-01-097-0778