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 5925-01-102-6486
NSN 5855-01-648-7687
NSN 6685-01-382-2996
NSN 5950-00-290-5507
NSN 4140-01-609-5718
NSN 6110-01-291-4872
NSN 5925-00-916-0367
NSN 5855-01-569-7816
NSN 5935-01-236-1501
NSN 6110-01-381-0469
NSN 6610-01-248-4339
NSN 5945-00-216-7432