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 6145-01-232-0528
NSN 6145-01-571-7928
NSN 4140-00-097-0167
NSN 6645-01-627-8040
NSN 5960-01-315-6993
NSN 5990-01-411-5930
NSN 5925-01-415-3640
NSN 5930-01-069-2776
NSN 6645-01-006-6735
NSN 6645-00-467-6094
NSN 5985-01-435-5082
NSN 4140-01-618-3407