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 6240-01-254-7599
NSN 5905-00-324-2670
NSN 5965-00-296-9994
NSN 5960-00-605-0226
NSN 5925-01-481-2643
NSN 7035-01-580-4346
NSN 4140-01-553-4614
NSN 5920-01-122-6303
NSN 5965-01-422-1392
NSN 7035-01-534-0597
NSN 5925-00-704-4491
NSN 5975-01-400-0627