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 5835-01-197-5673
NSN 2925-01-068-3844
NSN 5975-01-348-3477
NSN 5855-01-213-9076
NSN 5960-01-420-3072
NSN 6685-01-534-4623
NSN 6685-01-520-5401
NSN 6610-01-086-9545
NSN 5930-01-559-9057
NSN 5895-01-343-7800
NSN 5925-01-386-8049
NSN 6220-00-915-6592