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 5920-01-411-5512
NSN 5965-01-406-6320
NSN 6150-00-614-1011
NSN 5999-00-557-1789
NSN 6620-01-036-6687
NSN 5965-00-275-0491
NSN 6135-01-268-7056
NSN 6130-00-633-6187
NSN 6650-01-305-8881
NSN 5835-00-059-5854
NSN 5925-01-278-4957
NSN 6645-01-247-2201