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 4140-01-238-1373
NSN 6145-01-606-1849
NSN 6320-01-495-0512
NSN 5925-01-429-0162
NSN 6650-00-131-7284
NSN 5975-01-052-5059
NSN 6610-01-384-1587
NSN 6105-01-534-9701
NSN 5895-01-138-9852
NSN 6135-00-932-3136
NSN 6685-00-092-7953
NSN 6240-00-881-9624