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 5998-01-152-1221
NSN 6645-00-527-7258
NSN 6145-01-361-4731
NSN 4140-01-585-9196
NSN 6685-00-754-7495
NSN 5965-01-534-7152
NSN 5910-00-269-4755
NSN 2925-01-426-3410
NSN 5905-01-274-0417
NSN 6150-01-452-0066
NSN 5835-01-534-3172
NSN 6145-01-425-9981