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 5960-01-632-6576
NSN 5920-01-606-8573
NSN 6135-00-050-7189
NSN 4140-01-418-1894
NSN 6320-01-582-6668
NSN 5945-01-231-9607
NSN 6145-01-053-2969
NSN 6130-01-585-7679
NSN 6220-01-545-5479
NSN 5999-01-060-0020
NSN 6130-01-374-1268
NSN 5925-01-529-6836