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 6130-01-255-9393
NSN 5996-01-447-7116
NSN 6135-01-566-1034
NSN 6145-01-597-4090
NSN 5960-01-375-6815
NSN 6240-01-444-3508
NSN 5998-01-194-0099
NSN 5920-00-978-4937
NSN 5910-00-577-0040
NSN 5855-00-131-6338
NSN 6220-01-441-8662
NSN 5990-00-159-1774