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 5975-01-623-2378
NSN 6645-01-432-1068
NSN 6105-01-103-4498
NSN 6650-00-008-3941
NSN 6645-01-113-6712
NSN 5990-01-154-7296
NSN 7035-01-161-9878
NSN 5905-01-457-1989
NSN 5930-00-012-5808
NSN 2925-01-226-6126
NSN 6220-01-028-7419
NSN 7035-00-731-8729