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 6645-01-170-9969
NSN 6685-01-496-2150
NSN 5920-00-345-5833
NSN 6685-01-355-7377
NSN 6240-01-225-4671
NSN 5835-01-442-6482
NSN 5910-00-504-9059
NSN 6135-00-145-8884
NSN 5990-01-605-4769
NSN 6220-00-595-6954
NSN 5925-01-102-2356
NSN 6320-00-931-4855