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 5945-01-117-6774
NSN 6650-00-236-0724
NSN 5930-00-837-3380
NSN 5945-00-114-9779
NSN 2925-01-147-6688
NSN 5855-01-645-4172
NSN 6220-01-230-0872
NSN 5945-01-315-3818
NSN 6150-00-838-9611
NSN 5945-01-505-3160
NSN 6240-01-477-1262
NSN 6240-00-857-3785