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 5950-01-521-6729
NSN 6130-00-421-4107
NSN 5930-01-421-4957
NSN 6610-01-470-7360
NSN 5975-01-197-1923
NSN 5855-00-797-8217
NSN 5965-01-542-8510
NSN 5895-01-069-7896
NSN 5895-01-097-1463
NSN 5925-01-124-2441
NSN 5996-01-386-6394
NSN 6620-00-115-9050