Reference manual no. 37013-250
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 6320-01-204-2922
NSN 6220-01-643-2284
NSN 5920-01-039-6118
NSN 6320-01-459-6992
NSN 5930-00-867-7790
NSN 2925-01-618-2711
NSN 5975-00-185-5243
NSN 6320-00-004-9158
NSN 5960-00-584-4553
NSN 6685-00-222-8216
NSN 5990-01-643-2002
NSN 6220-01-214-3650