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 5965-01-656-0566
NSN 5960-00-250-7942
NSN 5905-01-399-8656
NSN 5975-01-568-9939
NSN 6620-01-111-9064
NSN 5920-00-655-4251
NSN 6110-01-137-2171
NSN 5990-01-097-4721
NSN 6105-01-477-4478
NSN 2925-00-632-8153
NSN 5960-00-104-5955
NSN 5905-01-328-1679