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 6610-01-431-8575
NSN 6110-01-644-8332
NSN 5975-00-448-5015
NSN 6685-01-645-6208
NSN 6220-00-801-3872
NSN 6135-01-142-6456
NSN 6645-00-988-4427
NSN 6110-01-003-9614
NSN 6150-01-442-0911
NSN 7035-00-797-2635
NSN 6320-01-006-6138
NSN 5910-01-442-6752