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 5975-01-536-9613
NSN 5999-01-425-1220
NSN 7035-00-763-6180
NSN 5835-00-985-1444
NSN 5895-00-233-7309
NSN 5960-00-420-0418
NSN 5950-00-906-3337
NSN 5935-01-422-0969
NSN 5965-01-222-0166
NSN 5905-00-147-9455
NSN 7035-00-902-8995
NSN 6620-00-815-0124