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 6105-01-390-4568
NSN 6645-01-538-5041
NSN 5835-00-170-5238
NSN 4140-01-083-1919
NSN 4140-01-461-2350
NSN 6645-01-442-4032
NSN 5965-00-950-0602
NSN 5905-01-634-0595
NSN 6320-01-592-6248
NSN 6610-00-026-4389
NSN 6645-01-608-6471
NSN 5910-01-085-3242