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 5925-01-268-5275
NSN 6145-01-645-7317
NSN 5975-00-618-8194
NSN 6110-00-577-8156
NSN 6220-01-064-4165
NSN 6130-00-530-3737
NSN 6240-01-367-1925
NSN 5990-01-476-9956
NSN 5960-00-104-5955
NSN 5910-00-163-4248
NSN 6220-01-422-1429
NSN 6610-00-191-5317