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 6220-01-344-8318
NSN 4140-01-517-5101
NSN 5960-00-266-6741
NSN 5990-01-411-5930
NSN 6150-01-202-9251
NSN 5935-01-015-0187
NSN 6145-00-776-9819
NSN 6685-00-789-3404
NSN 5855-01-264-8599
NSN 5835-01-593-3239
NSN 5960-00-932-0426
NSN 5920-00-529-0618