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 5835-01-123-8305
NSN 6145-01-463-9683
NSN 4140-00-267-8813
NSN 5920-01-542-9143
NSN 5855-00-930-9478
NSN 5925-01-522-0439
NSN 5930-01-442-0760
NSN 5975-00-225-1881
NSN 5990-01-248-4605
NSN 6135-00-553-7995
NSN 5905-01-235-4084
NSN 6620-00-816-9755