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 5965-01-005-0341
NSN 6645-01-222-5468
NSN 6130-01-652-2404
NSN 6145-01-118-3901
NSN 6320-00-270-8222
NSN 5985-01-034-0923
NSN 5835-01-071-9310
NSN 6240-00-204-0459
NSN 6110-01-029-2011
NSN 5835-00-111-3419
NSN 6240-01-315-5216
NSN 6135-01-354-5535