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 5920-01-471-9235
NSN 2925-00-132-1280
NSN 6240-00-726-4547
NSN 6135-00-016-0071
NSN 5950-01-077-7536
NSN 2925-01-619-4825
NSN 5855-00-237-4088
NSN 5996-01-439-2823
NSN 5945-00-682-9757
NSN 7035-00-215-3272
NSN 5996-01-534-9696
NSN 5999-01-587-2988