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 6645-00-321-6071
NSN 6145-01-111-0754
NSN 5920-01-499-1255
NSN 5925-01-537-0409
NSN 2925-01-633-4048
NSN 6685-01-495-8149
NSN 5835-01-394-3812
NSN 6145-01-654-1449
NSN 4140-01-651-9938
NSN 5965-01-170-4425
NSN 6135-01-397-2170
NSN 5985-01-039-5976