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 6645-01-089-6459
NSN 5960-00-382-6012
NSN 6130-00-544-4943
NSN 5960-01-293-6624
NSN 2925-00-139-8309
NSN 6650-01-487-4236
NSN 5945-00-740-8238
NSN 5905-00-394-7194
NSN 5985-01-386-3752
NSN 6645-01-252-9659
NSN 5985-01-273-9838
NSN 2925-00-163-9016