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 5985-01-398-3308
NSN 5975-01-593-0068
NSN 5965-01-258-5662
NSN 5996-01-420-7585
NSN 6145-00-468-8534
NSN 5990-01-645-2592
NSN 6105-00-728-8612
NSN 2925-01-011-5619
NSN 5915-01-386-6487
NSN 6145-01-328-3757
NSN 5950-00-079-6814
NSN 5910-01-253-9023