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 7035-01-443-3052
NSN 5855-01-154-3871
NSN 6150-00-471-3212
NSN 6130-01-341-9690
NSN 6135-00-951-3426
NSN 6685-01-010-2120
NSN 4140-00-640-6811
NSN 6650-01-371-9133
NSN 6240-00-889-7349
NSN 6610-01-433-6935
NSN 6650-01-024-9554
NSN 5975-01-567-0720