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 7035-01-577-5705
NSN 5960-01-332-9695
NSN 5996-01-278-5201
NSN 6240-01-252-9374
NSN 6145-01-643-7199
NSN 5855-00-058-1293
NSN 6645-00-887-0122
NSN 4140-00-993-0071
NSN 5945-01-557-3319
NSN 5975-01-542-8566
NSN 4140-01-133-9011
NSN 4140-01-411-7445