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 5855-01-537-3481
NSN 2925-01-386-7392
NSN 6135-01-071-4923
NSN 6620-00-242-3237
NSN 6145-01-080-2728
NSN 4140-01-332-3734
NSN 6685-01-461-3434
NSN 6645-01-423-7760
NSN 5985-00-428-2046
NSN 5975-01-601-7684
NSN 5998-01-406-4591
NSN 6145-01-386-3084