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 5910-01-161-4718
NSN 4140-01-163-8796
NSN 6150-01-420-6811
NSN 5975-01-003-8937
NSN 2925-01-004-5627
NSN 5996-01-459-8014
NSN 6645-01-014-9205
NSN 6320-01-444-7340
NSN 5935-00-773-3316
NSN 5950-00-900-5356
NSN 6135-01-479-4020
NSN 6130-01-280-4684