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 5975-01-522-4629
NSN 4140-01-350-2532
NSN 5996-00-240-3224
NSN 6150-01-519-8489
NSN 5985-00-999-1526
NSN 6150-00-557-7656
NSN 5960-00-425-9740
NSN 7035-00-908-4933
NSN 5855-01-254-3041
NSN 7035-01-386-5722
NSN 6220-00-003-8992
NSN 5910-00-199-4444