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 6220-01-289-0196
NSN 4140-01-299-2309
NSN 5965-00-188-5531
NSN 5855-01-606-3745
NSN 5960-01-428-3629
NSN 6610-01-212-9817
NSN 6650-00-904-9485
NSN 6150-01-420-5544
NSN 5999-01-486-0055
NSN 5935-01-467-1547
NSN 6110-00-875-0826
NSN 6145-01-097-0746