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 6620-00-600-9869
NSN 6130-01-641-0276
NSN 6110-00-247-0211
NSN 5895-01-436-8966
NSN 6620-01-327-3011
NSN 6145-01-367-1404
NSN 5855-00-586-6255
NSN 5835-00-823-6116
NSN 6240-01-493-5430
NSN 6645-01-434-9993
NSN 2925-00-333-4702
NSN 5930-01-515-9924