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 5985-01-329-0324
NSN 5945-01-161-2324
NSN 5950-01-217-3125
NSN 5985-00-150-7079
NSN 6620-01-600-0479
NSN 5915-00-556-6163
NSN 5950-01-034-4099
NSN 5895-00-258-9135
NSN 6145-01-233-2367
NSN 5996-00-243-6962
NSN 6240-00-054-7332
NSN 6135-00-708-0892