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 6645-00-435-5610
NSN 5950-01-277-4961
NSN 5930-00-242-8461
NSN 5950-01-513-8862
NSN 4140-00-981-8580
NSN 5996-00-149-1287
NSN 6130-00-077-0114
NSN 6685-01-589-6072
NSN 5925-01-513-5880
NSN 5999-00-661-0954
NSN 2925-01-327-3069
NSN 6645-00-819-5045