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 5910-01-430-5009
NSN 6610-01-391-6781
NSN 5998-01-044-2035
NSN 5905-00-456-4176
NSN 2925-01-604-8984
NSN 6150-01-068-8825
NSN 6145-01-239-3638
NSN 5965-01-028-6206
NSN 6240-00-617-9599
NSN 4140-00-099-9205
NSN 6150-01-328-2651
NSN 5930-01-433-7639