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 6220-00-758-9054
NSN 7035-01-214-5171
NSN 4140-01-393-4014
NSN 5950-01-399-6517
NSN 5920-00-683-7883
NSN 5935-00-919-3370
NSN 5975-01-611-8569
NSN 7035-01-202-8172
NSN 5996-01-446-0568
NSN 5895-00-740-7461
NSN 6110-00-765-2881
NSN 4140-01-256-4597