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 6110-01-326-6607
NSN 5960-01-512-0233
NSN 5915-01-498-3131
NSN 5920-01-068-0178
NSN 7035-00-200-5162
NSN 7035-01-145-5059
NSN 6685-00-700-9751
NSN 5925-01-192-1452
NSN 5945-01-335-7332
NSN 5895-01-166-4277
NSN 6685-01-220-4660
NSN 6145-00-150-5049