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 5835-01-431-6814
NSN 6110-01-246-2673
NSN 2925-01-520-4194
NSN 5945-00-152-4862
NSN 6645-00-464-6375
NSN 5925-01-435-5869
NSN 6685-01-499-8911
NSN 6240-01-300-3811
NSN 5960-01-355-2968
NSN 5965-00-856-0552
NSN 5950-01-421-3169
NSN 5920-00-964-9986