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 6620-00-269-5168
NSN 5835-01-560-8525
NSN 6685-00-691-4119
NSN 6685-01-398-9099
NSN 6610-01-378-8422
NSN 5925-01-277-1980
NSN 6110-00-021-6696
NSN 5910-01-296-9207
NSN 5935-01-372-8067
NSN 6220-01-045-2162
NSN 6685-01-656-2776
NSN 5920-01-561-3198