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 5925-01-248-8394
NSN 5910-01-196-6153
NSN 6220-01-168-1139
NSN 4140-00-580-8508
NSN 5935-01-514-5091
NSN 5965-01-322-8136
NSN 5975-01-115-1315
NSN 5935-00-798-5746
NSN 5990-00-197-0159
NSN 5998-01-414-1871
NSN 6240-01-429-9002
NSN 5905-01-147-3855