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 2925-00-605-8520
NSN 6110-01-076-7408
NSN 5930-00-596-4523
NSN 5905-01-444-1245
NSN 5920-01-648-1510
NSN 6220-01-424-0687
NSN 6130-00-402-0559
NSN 4140-01-530-0727
NSN 5999-00-357-3643
NSN 6610-01-266-8691
NSN 6135-00-347-0595
NSN 6645-00-309-0447