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 6650-01-412-9541
NSN 5905-01-365-0340
NSN 6645-00-116-1409
NSN 6150-01-224-2899
NSN 6650-00-692-1541
NSN 5835-01-515-6537
NSN 6685-01-245-9296
NSN 5985-00-197-5392
NSN 5915-01-422-7430
NSN 5996-00-098-3864
NSN 7035-01-403-2841
NSN 5975-01-642-4518