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 5999-00-401-4381
NSN 6110-01-130-8038
NSN 6240-01-365-7996
NSN 5985-01-498-3445
NSN 6620-01-502-9104
NSN 5855-01-111-3962
NSN 6110-01-505-2074
NSN 6150-00-420-4003
NSN 6105-00-413-2558
NSN 6645-00-902-4924
NSN 2925-01-250-2731
NSN 5960-00-958-5222