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 5990-01-095-8866
NSN 2925-01-354-1752
NSN 5915-01-533-1871
NSN 6130-01-459-8018
NSN 5985-00-399-1174
NSN 5895-00-342-9581
NSN 6620-00-575-9230
NSN 5895-01-396-9058
NSN 6135-01-161-3914
NSN 7035-00-946-2642
NSN 5960-00-800-1403
NSN 6320-01-021-6633