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 6610-01-364-0294
NSN 6150-01-350-1387
NSN 6150-00-248-3866
NSN 6320-01-592-6248
NSN 5925-01-305-8589
NSN 5855-01-076-9369
NSN 6145-00-678-0429
NSN 7035-01-658-7251
NSN 4140-01-055-6355
NSN 2925-01-559-5733
NSN 5985-01-422-8561
NSN 5895-01-440-8722