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 5975-00-064-8685
NSN 5855-00-361-0167
NSN 5915-01-391-8810
NSN 6610-01-375-1527
NSN 6135-00-369-2368
NSN 6685-01-224-8900
NSN 5960-00-194-1488
NSN 6220-01-483-0774
NSN 5895-00-431-5687
NSN 6145-01-549-3370
NSN 5930-00-516-1217
NSN 6620-01-524-0583