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 5910-01-417-8916
NSN 5996-01-510-3257
NSN 5895-01-201-0419
NSN 5925-01-482-3642
NSN 5910-00-003-2656
NSN 6145-01-449-1309
NSN 6650-01-629-9480
NSN 6645-01-514-7403
NSN 6645-01-128-0895
NSN 6620-01-125-8904
NSN 5915-01-327-3617
NSN 6220-01-556-3998