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 6145-01-647-1119
NSN 5855-01-093-3080
NSN 6240-00-088-8054
NSN 5855-00-058-1293
NSN 6685-00-116-8073
NSN 6620-00-332-5550
NSN 6135-01-231-0444
NSN 6220-00-021-9040
NSN 5920-01-429-0354
NSN 6220-00-281-5974
NSN 5920-01-437-7347
NSN 5835-01-485-0210