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 5960-00-338-9164
NSN 6105-01-040-5665
NSN 5855-01-007-9541
NSN 6110-01-362-0298
NSN 5965-01-500-2468
NSN 5945-01-408-5522
NSN 6145-01-254-4505
NSN 6620-01-462-5196
NSN 5910-00-225-3667
NSN 5965-01-478-1175
NSN 2925-00-265-7539
NSN 6645-01-242-0340