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 6105-01-208-1032
NSN 6620-01-378-9193
NSN 5915-01-347-4085
NSN 6145-00-135-1436
NSN 5835-01-319-0262
NSN 6240-01-345-7266
NSN 5985-00-532-3710
NSN 6620-00-697-1398
NSN 5985-01-352-1063
NSN 5945-00-461-0564
NSN 6320-00-242-3300
NSN 5985-00-269-5388