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 6145-01-658-9099
NSN 5855-01-534-6802
NSN 5920-01-007-8775
NSN 6145-01-045-2594
NSN 5920-01-258-5320
NSN 5935-01-170-4158
NSN 6645-00-434-8793
NSN 6620-01-378-5579
NSN 5965-01-359-5501
NSN 5935-00-456-4792
NSN 6130-00-189-8000
NSN 5925-01-600-6303