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 5905-00-738-6298
NSN 5930-01-112-8193
NSN 6620-00-726-8153
NSN 6130-00-248-7244
NSN 5960-00-774-4515
NSN 6650-00-789-5128
NSN 5960-01-266-9520
NSN 6645-01-606-7684
NSN 5925-01-030-7683
NSN 5985-01-057-6100
NSN 5835-01-580-0446
NSN 5990-01-512-9129