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 5910-00-958-8330
NSN 6150-00-148-8515
NSN 5925-01-208-7217
NSN 5998-01-475-8196
NSN 6105-01-433-2204
NSN 6685-00-104-7149
NSN 5998-00-194-2942
NSN 5999-01-406-3161
NSN 5945-01-505-4558
NSN 5975-01-275-6910
NSN 5990-01-217-4590
NSN 4140-00-485-6139