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 5945-01-141-9308
NSN 5905-00-217-7999
NSN 6320-01-155-8295
NSN 5915-01-462-0432
NSN 7035-00-059-7970
NSN 6135-01-313-1948
NSN 5910-01-408-5589
NSN 6150-01-186-0593
NSN 7035-01-088-9029
NSN 6145-01-300-2983
NSN 5920-01-286-7072
NSN 6650-01-573-7165