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 6645-01-258-8415
NSN 6645-01-133-4440
NSN 6240-01-294-8997
NSN 5950-01-134-5041
NSN 5915-01-189-1847
NSN 5960-00-005-7132
NSN 6240-01-506-6778
NSN 5905-01-190-1275
NSN 5925-00-400-1561
NSN 6610-01-076-4800
NSN 6320-01-113-7647
NSN 5920-01-425-0963