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 2925-01-039-6856
NSN 6110-01-172-7338
NSN 5998-00-398-0021
NSN 2925-01-127-0167
NSN 4140-01-353-5031
NSN 6650-01-446-2025
NSN 5855-01-277-1663
NSN 6685-01-414-9703
NSN 5975-01-325-6024
NSN 6685-00-244-1029
NSN 6645-01-567-8282
NSN 5945-00-197-7673