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 6220-00-272-7497
NSN 5920-01-449-8669
NSN 5975-01-623-4042
NSN 5925-01-489-2791
NSN 5920-01-415-6546
NSN 4140-00-128-8072
NSN 5925-01-087-7033
NSN 5930-01-530-3208
NSN 5985-01-186-4746
NSN 6135-00-191-6444
NSN 5930-00-084-4309
NSN 5930-01-628-9031