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 6685-01-649-1504
NSN 5895-00-225-9589
NSN 5990-01-310-2848
NSN 6110-00-111-2761
NSN 5935-01-377-0968
NSN 6105-00-187-0094
NSN 6135-00-985-7887
NSN 6105-00-292-3112
NSN 6320-01-409-1388
NSN 5930-01-548-5273
NSN 5990-01-502-8209
NSN 7035-01-600-4127