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 5975-00-246-4906
NSN 5960-00-412-1202
NSN 2925-00-870-2372
NSN 5950-01-535-6326
NSN 4140-01-614-9681
NSN 5975-00-293-8166
NSN 5925-00-728-9386
NSN 5960-00-269-4762
NSN 6110-01-121-8318
NSN 5855-01-276-4497
NSN 2925-01-076-6128
NSN 4140-00-905-8331