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 5975-01-379-0747
NSN 6610-00-083-9014
NSN 6150-01-098-9609
NSN 6220-00-443-0589
NSN 5835-01-383-1313
NSN 5920-01-265-1288
NSN 7035-01-449-1846
NSN 5985-01-533-1558
NSN 5905-01-424-4177
NSN 5855-01-286-9928
NSN 4140-00-067-7460
NSN 5925-00-501-8448