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 6610-01-034-9044
NSN 6130-00-541-8468
NSN 6110-01-113-1581
NSN 5855-00-944-0949
NSN 5905-01-016-7512
NSN 6220-01-539-3766
NSN 5990-01-416-1017
NSN 4140-01-629-4684
NSN 5895-01-534-8425
NSN 5935-00-450-5927
NSN 6650-01-142-7673
NSN 5855-01-360-6650