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 6645-00-204-4100
NSN 6240-01-274-4237
NSN 5895-00-979-7814
NSN 5985-00-035-4558
NSN 5996-00-407-4548
NSN 5996-01-476-2131
NSN 5985-01-440-9350
NSN 5950-01-313-6039
NSN 5996-01-653-9570
NSN 5935-00-407-0455
NSN 6130-01-462-4226
NSN 5975-01-442-5558