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 5855-01-530-2057
NSN 5990-01-602-6701
NSN 5999-01-509-5368
NSN 5920-00-498-1392
NSN 5998-01-615-3249
NSN 6620-01-057-2580
NSN 6645-01-162-8023
NSN 5910-00-177-6752
NSN 5915-00-144-5548
NSN 6110-00-156-6468
NSN 7035-00-361-5975
NSN 6610-01-222-4573