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 6150-01-158-8232
NSN 6620-01-483-5247
NSN 6135-00-161-0746
NSN 4140-01-051-0421
NSN 5965-00-267-4173
NSN 5950-01-221-3808
NSN 5895-00-089-9656
NSN 5925-01-577-1750
NSN 7035-01-443-3052
NSN 5996-01-432-2356
NSN 5950-01-592-2121
NSN 6320-01-224-0063