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 5999-01-093-2723
NSN 5905-01-024-6264
NSN 5855-00-631-4565
NSN 6685-00-182-7788
NSN 6145-01-514-0593
NSN 6130-00-916-8490
NSN 5905-01-037-2295
NSN 5925-00-188-8678
NSN 5996-00-177-8722
NSN 6110-00-418-9363
NSN 6240-00-550-6911
NSN 6240-00-957-5724