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 6145-00-010-1425
NSN 6685-01-491-6587
NSN 5990-01-090-9312
NSN 5835-00-233-6327
NSN 6130-01-212-3264
NSN 6150-01-098-7006
NSN 5999-01-441-9308
NSN 5930-01-442-8012
NSN 6130-01-653-1424
NSN 7035-01-139-2637
NSN 5999-00-517-6778
NSN 6220-01-475-7687