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 5950-01-426-7978
NSN 5985-01-464-0410
NSN 5925-01-646-3287
NSN 5905-00-416-4784
NSN 5910-01-188-6858
NSN 5835-00-034-4976
NSN 5925-01-134-8031
NSN 5895-00-960-7403
NSN 6685-01-407-6445
NSN 6610-00-435-8932
NSN 6645-01-626-3651
NSN 5930-00-500-9077