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 5835-00-912-5656
NSN 5996-00-828-4170
NSN 6685-01-171-4478
NSN 2925-01-091-4734
NSN 5960-01-353-5947
NSN 5999-01-543-8960
NSN 5945-01-361-9775
NSN 4140-01-025-4911
NSN 5895-01-641-1481
NSN 5990-01-531-5962
NSN 5990-01-562-4521
NSN 5965-01-323-8134