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 5990-01-386-3040
NSN 4140-01-483-3955
NSN 5950-01-465-9260
NSN 6645-00-879-9941
NSN 6105-01-112-8206
NSN 6240-00-292-3237
NSN 5855-01-114-3513
NSN 6685-01-401-5360
NSN 6645-01-535-7136
NSN 5998-01-270-3425
NSN 5965-01-620-5320
NSN 5930-00-252-7049