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 5855-00-688-9954
NSN 5910-01-202-6167
NSN 6240-01-394-8592
NSN 5960-01-439-9517
NSN 5960-01-115-6840
NSN 5960-00-079-3769
NSN 5895-00-862-5564
NSN 5855-01-562-3132
NSN 6610-01-359-9809
NSN 5855-01-533-6145
NSN 5835-00-624-1548
NSN 5990-01-303-6110