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 5935-01-225-1417
NSN 6220-00-173-3967
NSN 5930-01-391-5093
NSN 5960-01-008-4636
NSN 6145-00-840-6685
NSN 5985-01-191-7050
NSN 5905-01-370-4989
NSN 5930-01-354-1666
NSN 6620-00-251-0569
NSN 6650-01-593-5993
NSN 4140-01-280-5364
NSN 6135-00-898-6996