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 5985-01-534-6500
NSN 5905-01-164-1485
NSN 2925-01-295-9337
NSN 6685-01-043-2408
NSN 4140-00-347-6807
NSN 6150-01-396-1881
NSN 5990-01-431-6749
NSN 6135-01-050-3194
NSN 5998-01-196-5719
NSN 5999-00-334-9501
NSN 5996-00-279-5806
NSN 5996-00-447-9511