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 6645-00-137-7699
NSN 5925-01-515-1378
NSN 5895-01-051-5885
NSN 6240-01-428-8941
NSN 5985-00-277-7371
NSN 6320-01-424-8606
NSN 5996-00-149-1287
NSN 6620-00-562-6337
NSN 5965-01-280-3772
NSN 6135-01-265-1384
NSN 5965-01-084-6921
NSN 5835-01-160-7282