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 5975-01-148-9397
NSN 5920-01-526-2499
NSN 6320-00-931-4855
NSN 5950-01-042-0153
NSN 5975-01-152-9353
NSN 5990-00-106-6609
NSN 5855-01-575-4439
NSN 5835-01-414-3258
NSN 6135-01-364-0667
NSN 6610-01-078-9238
NSN 5999-00-914-1774
NSN 6610-01-031-1113