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 5960-01-449-1310
NSN 5930-01-660-5060
NSN 5895-00-196-1916
NSN 2925-01-055-9705
NSN 5985-01-296-9915
NSN 5965-01-356-5358
NSN 5915-00-887-8999
NSN 5920-01-474-2227
NSN 5960-01-264-2087
NSN 7035-01-261-9850
NSN 6110-00-188-9874
NSN 6150-01-181-9781