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 5998-01-302-8898
NSN 6240-00-978-9752
NSN 6145-00-840-6458
NSN 6220-01-364-8666
NSN 5925-01-056-7608
NSN 5935-00-648-3298
NSN 4140-00-035-4997
NSN 5985-01-170-4076
NSN 6645-00-268-4042
NSN 6135-00-613-1068
NSN 6105-01-547-9676
NSN 5915-00-007-3813