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 5855-00-943-3894
NSN 5855-01-494-5916
NSN 5905-01-285-7199
NSN 5895-01-304-9920
NSN 5925-00-262-6087
NSN 5960-01-279-0985
NSN 5835-00-545-8219
NSN 5855-00-757-5149
NSN 5990-01-426-7350
NSN 6610-01-151-1540
NSN 2925-00-580-3018
NSN 6645-01-551-6893