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 5835-01-263-1293
NSN 5855-01-290-3248
NSN 5999-01-221-2922
NSN 5998-00-606-7447
NSN 5835-00-195-7508
NSN 6240-01-579-3213
NSN 5960-01-299-9182
NSN 5975-01-105-0793
NSN 5930-01-021-8144
NSN 5855-01-236-9645
NSN 5835-01-159-9088
NSN 5985-01-472-0643