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 6135-01-426-8282
NSN 6110-00-051-4427
NSN 6145-00-596-2606
NSN 6145-01-646-6129
NSN 5945-00-327-1250
NSN 5998-01-592-5063
NSN 5975-01-172-5691
NSN 5965-00-226-0209
NSN 5925-00-227-0396
NSN 5930-00-681-4727
NSN 2925-01-469-8229
NSN 5930-00-111-2727