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 5895-01-417-8026
NSN 6220-00-200-7888
NSN 5855-01-279-9938
NSN 5985-01-036-1426
NSN 4140-00-385-2925
NSN 5950-01-474-3749
NSN 6610-01-623-2984
NSN 5985-01-416-5803
NSN 7035-00-981-7216
NSN 6135-01-520-3618
NSN 5935-01-364-3730
NSN 5985-01-608-7865