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 5985-00-068-1840
NSN 4140-00-833-5068
NSN 5855-00-688-9954
NSN 6610-01-037-9046
NSN 5925-00-006-3539
NSN 5855-00-051-2792
NSN 6135-00-182-7008
NSN 5895-00-926-2633
NSN 6320-00-731-6134
NSN 5996-01-009-5482
NSN 6320-01-607-1491
NSN 5925-01-146-8745