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 5950-01-273-7297
NSN 5895-01-515-2713
NSN 5920-01-442-3140
NSN 4140-01-576-6499
NSN 5920-01-010-4855
NSN 6320-01-607-1491
NSN 6650-01-158-5099
NSN 6685-01-167-7364
NSN 6150-01-239-3122
NSN 6645-01-430-2420
NSN 5965-00-244-8428
NSN 6610-01-553-8004