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 6150-01-226-9305
NSN 5965-01-285-2133
NSN 5985-00-462-4042
NSN 6320-00-790-4844
NSN 5950-01-593-7117
NSN 5925-00-137-4814
NSN 6620-01-207-0667
NSN 6110-01-439-2437
NSN 6320-00-977-3930
NSN 6135-01-451-2120
NSN 2925-00-947-9814
NSN 5990-01-327-1558