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 6650-01-428-9958
NSN 5960-01-362-9638
NSN 6150-01-005-0150
NSN 6150-00-661-0184
NSN 5960-00-285-1001
NSN 5905-01-023-6887
NSN 5930-00-254-2302
NSN 6145-00-269-4271
NSN 6145-00-686-5065
NSN 5996-01-319-4568
NSN 5990-00-960-3099
NSN 6685-01-142-1969