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 6650-01-065-1704
NSN 6620-00-789-1638
NSN 6610-00-832-0608
NSN 6685-01-333-7597
NSN 5999-01-151-9821
NSN 5915-00-737-6207
NSN 2925-00-724-3140
NSN 5996-01-187-8571
NSN 5999-01-293-4186
NSN 5945-00-886-2290
NSN 6105-01-149-8830
NSN 6105-00-702-1333