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 6620-01-476-4567
NSN 6645-00-928-7208
NSN 5945-01-196-9392
NSN 6610-01-087-4701
NSN 6130-01-259-0623
NSN 5930-01-081-0029
NSN 5998-01-037-2748
NSN 5990-01-368-2604
NSN 5945-01-113-7250
NSN 5985-01-515-7773
NSN 5915-01-089-9836
NSN 5930-00-111-1053