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 5855-00-156-5489
NSN 5905-00-392-9480
NSN 5985-01-277-1645
NSN 5985-00-376-5406
NSN 6620-00-376-7046
NSN 5950-00-843-8673
NSN 5895-01-467-8965
NSN 5835-01-608-8868
NSN 5905-00-296-4943
NSN 6220-00-778-7213
NSN 6610-00-596-9883
NSN 6130-01-466-5592