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 6240-00-101-0008
NSN 5960-01-442-0908
NSN 7035-00-252-7467
NSN 6320-01-326-1316
NSN 6135-01-193-8154
NSN 6650-01-389-9212
NSN 5855-01-436-7621
NSN 2925-01-107-7939
NSN 6145-00-013-9939
NSN 6105-01-202-9339
NSN 5965-01-169-1194
NSN 5950-01-213-5328