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 5905-01-434-5704
NSN 5960-01-212-7413
NSN 5945-01-576-8492
NSN 5930-01-054-2055
NSN 5910-01-254-4373
NSN 5996-01-149-8835
NSN 5920-01-385-8307
NSN 5895-01-540-7978
NSN 6105-01-160-8599
NSN 6150-01-359-4876
NSN 6645-00-152-6545
NSN 4140-01-361-8175