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 5990-00-518-0684
NSN 6105-01-487-3686
NSN 5905-01-211-8314
NSN 5915-01-053-8968
NSN 7035-01-058-5668
NSN 5985-01-526-3787
NSN 5920-01-242-1691
NSN 5965-00-923-6824
NSN 5960-01-252-8821
NSN 6150-00-262-0477
NSN 6150-01-265-8397
NSN 5855-00-631-4565