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 6240-01-451-1409
NSN 6610-00-808-7040
NSN 5945-00-989-8632
NSN 5996-00-823-9164
NSN 6145-00-172-6488
NSN 5895-01-461-8287
NSN 6620-01-078-6372
NSN 5905-00-228-5506
NSN 5935-01-015-6180
NSN 6145-01-068-0017
NSN 7035-01-150-6303
NSN 5985-01-029-3648