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 5965-01-116-1886
NSN 5915-00-597-0038
NSN 6685-01-278-6951
NSN 6320-01-651-7476
NSN 5990-00-647-4008
NSN 6620-00-643-1402
NSN 6150-01-154-9686
NSN 5990-01-197-6922
NSN 5905-01-359-3041
NSN 6240-01-414-9529
NSN 5945-00-256-3442
NSN 6645-01-422-5686