Mark, I have disassembled at least 30 English boxlocks in my lifetime and never has that shaft exceeded 1/8" dia. My vocation was a master instrument maker for the Eastman Kodak Co. fabricating precision sheet metal parts and machined parts. My hobbies include gunsmithing and participating in the Indianapolis 500 as assistant chief mechanic. My home provides space for a complete machine shop. I've been a machinist for fifty years
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