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 5905-01-311-5308
NSN 6645-01-204-5629
NSN 5910-01-479-8094
NSN 5905-01-517-9579
NSN 6610-01-435-5425
NSN 5910-01-372-0224
NSN 6650-00-546-5005
NSN 6240-00-518-3541
NSN 5996-01-029-8011
NSN 2925-00-312-8568
NSN 5915-01-372-8224
NSN 5855-01-351-2541