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 6320-00-483-0451
NSN 6220-00-371-7589
NSN 6150-00-419-0505
NSN 5835-01-029-5602
NSN 6685-00-653-1190
NSN 5855-00-189-6066
NSN 6685-01-538-4368
NSN 5905-01-080-9145
NSN 6610-01-478-7509
NSN 5910-00-810-4277
NSN 5895-00-790-6775
NSN 6150-01-230-6696