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 5965-00-153-5216
NSN 6240-01-551-5815
NSN 5945-01-222-1658
NSN 6620-00-441-5252
NSN 5950-01-069-8475
NSN 6130-01-021-8281
NSN 5996-01-334-8675
NSN 6145-00-233-5821
NSN 6645-00-808-1407
NSN 5990-01-421-5342
NSN 5945-01-613-3041
NSN 2925-00-404-6461