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 5905-00-194-0842
NSN 5999-00-935-2335
NSN 6650-00-809-1817
NSN 5985-01-095-5569
NSN 2925-00-311-0825
NSN 4140-01-196-0501
NSN 5935-01-254-1688
NSN 5975-00-347-9710
NSN 7035-01-633-9537
NSN 5910-00-939-1692
NSN 6110-01-479-9528
NSN 4140-01-217-6290