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 5905-01-292-2086
NSN 6645-00-067-7070
NSN 5855-00-944-0949
NSN 5998-01-352-9147
NSN 6135-01-633-8502
NSN 6110-01-411-6660
NSN 5835-00-445-5539
NSN 6110-01-502-9212
NSN 5930-01-187-3307
NSN 6220-01-507-9614
NSN 6220-01-344-5014
NSN 6110-00-993-3930