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 2925-00-328-2018
NSN 6685-01-578-0967
NSN 2925-00-149-0760
NSN 5996-01-088-7074
NSN 5960-01-502-6270
NSN 5895-01-512-2023
NSN 5998-01-557-5375
NSN 6135-01-618-8314
NSN 6240-01-495-6759
NSN 6610-00-226-4710
NSN 5996-01-071-6441
NSN 6645-01-324-0348