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 6150-01-170-5658
NSN 6685-00-540-9017
NSN 6150-01-433-7839
NSN 5945-01-399-7647
NSN 6320-00-336-9123
NSN 5975-00-455-9388
NSN 7035-01-407-6413
NSN 4140-01-464-0711
NSN 6220-01-206-7663
NSN 6685-00-978-1937
NSN 6240-00-472-4635
NSN 5960-01-215-0992