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 6220-01-071-8437
NSN 5895-00-124-8908
NSN 5998-00-383-6191
NSN 6105-01-319-7052
NSN 5945-00-942-5539
NSN 5960-01-458-6484
NSN 6620-01-121-4019
NSN 6610-01-116-9276
NSN 5975-01-605-5192
NSN 6135-01-470-4077
NSN 6685-00-027-4032
NSN 6105-00-187-6070