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 6150-00-394-8888
NSN 6240-01-186-3273
NSN 6620-00-104-6937
NSN 5920-01-425-0158
NSN 5920-01-580-4002
NSN 7035-01-592-2562
NSN 5960-00-268-3200
NSN 5975-01-003-9803
NSN 5835-00-289-9080
NSN 5905-01-367-2526
NSN 6610-00-480-1200
NSN 5910-00-356-4594