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 6145-01-261-1940
NSN 5855-01-100-3272
NSN 5996-01-457-0335
NSN 5930-01-608-7352
NSN 5960-01-089-7174
NSN 7035-00-349-8571
NSN 5930-01-044-5547
NSN 5996-01-188-3339
NSN 5905-01-005-0425
NSN 5925-00-796-6113
NSN 6145-00-921-7990
NSN 6645-01-510-2802