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 5930-00-017-2540
NSN 6610-01-167-8747
NSN 6150-01-146-4833
NSN 6645-00-243-7541
NSN 6220-01-417-3450
NSN 7035-01-424-7019
NSN 5915-01-451-4332
NSN 2925-00-078-0525
NSN 6105-01-481-4476
NSN 5965-01-463-2815
NSN 5915-01-542-9037
NSN 5990-00-051-7527