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 5996-00-333-5182
NSN 5996-01-285-2353
NSN 5930-00-644-9537
NSN 5990-01-277-9753
NSN 5920-01-462-5065
NSN 7035-00-064-7008
NSN 5965-01-113-6654
NSN 5895-01-477-5265
NSN 5855-00-361-0167
NSN 6110-00-187-4537
NSN 5835-01-653-7806
NSN 6135-01-327-2092