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 5855-00-010-6492
NSN 6110-01-239-4180
NSN 5996-01-099-7063
NSN 5895-01-188-8820
NSN 6145-00-216-6613
NSN 2925-00-169-3775
NSN 6150-00-195-1827
NSN 6105-00-484-1890
NSN 5910-01-419-3246
NSN 6650-01-385-9447
NSN 5975-00-276-7559
NSN 6135-01-557-3351