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 5960-01-143-1202
NSN 5975-01-457-4021
NSN 6220-00-085-5206
NSN 5985-00-545-7191
NSN 5950-01-287-9249
NSN 5960-01-431-4291
NSN 5930-01-437-3539
NSN 6240-00-904-6650
NSN 6150-01-265-1142
NSN 5998-01-457-2248
NSN 6220-01-591-1346
NSN 5965-01-055-7645