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 5910-00-164-2978
NSN 4140-01-386-6688
NSN 5945-00-138-1178
NSN 5910-01-512-8782
NSN 6240-01-041-2519
NSN 6320-01-390-5385
NSN 4140-01-555-8190
NSN 5895-00-159-1237
NSN 5905-01-094-6546
NSN 6610-01-508-3125
NSN 5905-01-046-3741
NSN 5998-01-426-3332