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 5950-00-369-1593
NSN 6135-01-168-2944
NSN 4140-01-571-9040
NSN 5985-01-171-3716
NSN 5999-01-512-0377
NSN 5998-00-918-2634
NSN 5999-01-497-3359
NSN 5965-01-339-5321
NSN 6145-01-550-8398
NSN 6645-00-171-9639
NSN 5975-01-433-2169
NSN 6650-00-851-4772