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 6610-00-237-6154
NSN 7035-00-488-9765
NSN 6240-01-369-2956
NSN 6105-01-120-3046
NSN 6320-00-646-3311
NSN 6645-01-303-5855
NSN 6320-01-202-8761
NSN 4140-01-230-7027
NSN 5960-01-573-6483
NSN 6220-01-555-7467
NSN 5915-01-451-4332
NSN 6320-00-450-7014