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 5905-00-965-9859
NSN 5965-01-260-2547
NSN 5999-01-350-8358
NSN 6110-01-035-5735
NSN 5920-00-519-7664
NSN 4140-01-484-9108
NSN 7035-01-096-8912
NSN 5998-00-946-1823
NSN 5996-01-069-5662
NSN 6130-01-170-5085
NSN 5855-01-098-9038
NSN 5965-00-653-4782