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 5920-00-006-1919
NSN 5950-01-537-4338
NSN 2925-00-982-0409
NSN 6130-01-645-0003
NSN 5960-01-381-2478
NSN 5945-00-265-1762
NSN 5990-00-365-4591
NSN 6685-01-058-1179
NSN 6135-01-069-8575
NSN 5895-01-562-3494
NSN 6645-01-398-2505
NSN 5855-01-027-1571