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 5930-01-269-2218
NSN 6145-01-555-8781
NSN 5960-01-245-0029
NSN 2925-01-163-6716
NSN 6130-01-468-0237
NSN 5985-00-090-3851
NSN 4140-00-482-2668
NSN 5999-01-565-4454
NSN 5930-00-553-9211
NSN 2925-01-545-2717
NSN 5960-00-134-0607
NSN 5996-00-162-6083