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 5855-01-249-0717
NSN 5985-01-613-9496
NSN 5960-01-125-2356
NSN 5960-01-464-9605
NSN 6240-00-284-1457
NSN 4140-01-331-5974
NSN 6145-01-166-8664
NSN 5996-01-236-9467
NSN 5895-00-302-3638
NSN 5895-00-353-1795
NSN 4140-00-917-4308
NSN 5905-00-148-0368