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 5945-01-641-7803
NSN 5925-01-172-0036
NSN 5930-01-024-4921
NSN 5930-01-046-9771
NSN 5998-01-549-7652
NSN 6105-01-396-2195
NSN 5925-01-054-3453
NSN 7035-01-012-0286
NSN 5945-00-332-2007
NSN 6650-01-438-7323
NSN 5965-00-529-0602
NSN 6645-00-551-3650