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 6320-01-275-3972
NSN 6240-01-480-2448
NSN 6610-01-105-9520
NSN 6110-00-350-9571
NSN 6685-00-395-3272
NSN 5965-00-985-4152
NSN 6135-00-377-9165
NSN 6220-01-560-3768
NSN 6150-00-861-8576
NSN 5905-00-387-5083
NSN 2925-01-567-8027
NSN 6240-01-631-6116