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 6110-01-463-9260
NSN 6645-01-510-3496
NSN 4140-01-397-4174
NSN 5945-00-839-6151
NSN 6610-01-261-4487
NSN 6220-01-515-0670
NSN 5999-01-449-1345
NSN 6645-01-076-4655
NSN 5990-01-189-9338
NSN 5945-01-336-7444
NSN 6650-01-177-4398
NSN 5945-01-274-1612