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 6645-01-063-8243
NSN 5920-01-122-4181
NSN 5960-01-325-2241
NSN 5835-01-323-2581
NSN 6650-00-221-7119
NSN 5905-01-603-9769
NSN 5920-01-377-3401
NSN 4140-01-433-1192
NSN 5996-01-124-2407
NSN 6685-00-214-3722
NSN 6145-00-596-8447
NSN 6620-01-603-6442