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 5935-00-942-6739
NSN 6130-01-481-3599
NSN 6645-00-079-4087
NSN 5910-00-530-6094
NSN 6320-00-456-2092
NSN 6650-01-357-0785
NSN 7035-01-099-6772
NSN 6645-00-503-1379
NSN 6240-01-561-6593
NSN 5905-00-436-3955
NSN 5930-01-330-7221
NSN 6150-00-915-6790