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 6220-00-909-7239
NSN 4140-00-214-3999
NSN 5915-01-313-1625
NSN 6645-01-185-7684
NSN 6130-01-389-2031
NSN 5985-01-456-2996
NSN 5945-01-221-4151
NSN 6685-01-102-9709
NSN 5855-01-258-7557
NSN 6135-01-029-9315
NSN 5990-00-486-8825
NSN 6150-01-381-1034