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 5935-01-390-8297
NSN 5915-00-686-9149
NSN 6130-00-991-5137
NSN 5920-01-227-6998
NSN 5998-01-303-7984
NSN 5855-01-433-2220
NSN 5996-00-625-5410
NSN 6145-00-448-5414
NSN 5855-00-427-7848
NSN 6135-00-911-9321
NSN 6150-01-386-3821
NSN 5990-01-411-5930