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 6685-00-935-6961
NSN 6240-01-649-2988
NSN 5996-00-856-5810
NSN 5950-01-253-1170
NSN 7035-01-453-4242
NSN 5960-01-609-6565
NSN 6145-01-431-7767
NSN 6220-00-676-0904
NSN 5835-01-079-9533
NSN 5855-00-479-9819
NSN 5985-01-557-9573
NSN 5920-00-469-8051