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 5925-00-100-0102
NSN 5998-01-607-3606
NSN 6145-01-568-1832
NSN 6110-01-121-8318
NSN 5935-01-570-8222
NSN 4140-01-303-5059
NSN 5985-01-146-6807
NSN 5950-01-226-9786
NSN 5925-00-325-4424
NSN 6645-00-507-5544
NSN 5925-01-288-0025
NSN 6220-00-160-9372