This Winchester manufactured mainspring strain screw is for the post 64 model 94 top eject lever action carbines manufactured between 1964 and 1977 and having a serial number below 4,580,000. This screw is in very good condition with light wear. (file photo)

Note: Winchester Post 64 Model 94 Top Eject Carbines with the following calibers and serial numbers have been observed with this part:

30-30 Win: 3195062, 3370887, 4019219, 4384971 & 4455049