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 6685-00-267-9480
NSN 6650-00-710-8130
NSN 5835-01-202-9673
NSN 6685-01-246-8336
NSN 5910-01-626-4351
NSN 5895-00-490-1550
NSN 5835-00-177-2970
NSN 5930-00-079-0171
NSN 7035-01-560-2623
NSN 5930-01-250-3945
NSN 5985-01-561-8726
NSN 6685-01-454-4007