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1/2"-28 by 0.400" long thread protector.


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1/2"-28 by 0.400" long thread protector. These quality knurled thread protectors are made from steel and black oxide finished (Mil-std-171 / Milspec MIL-C-13924C, Class 1). Best suited to barrels 0.6" in diameter or less, but can be used on any diameter barrel.