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 6145-01-377-0706
NSN 5945-01-608-5803
NSN 5985-01-392-5582
NSN 6240-01-092-6678
NSN 5920-00-180-4278
NSN 5985-00-636-0025
NSN 5996-01-383-1478
NSN 5910-01-386-9602
NSN 5920-01-172-9978
NSN 6110-01-088-2988
NSN 6105-01-335-9155
NSN 5975-01-459-2639