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 4140-00-950-6951
NSN 5925-01-437-5190
NSN 5915-01-077-4213
NSN 5910-00-808-7021
NSN 6610-00-478-2815
NSN 6685-00-189-8639
NSN 5945-01-417-6608
NSN 6130-00-104-5573
NSN 5945-01-424-8636
NSN 5930-00-036-0381
NSN 5835-00-572-7445
NSN 6620-01-622-3035