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313-31 Bascule Bridge Crank Arm Shoulder Screw
313-31 Bascule Bridge Crank Arm Shoulder Screw

313-31 Bascule Bridge Crank Arm Shoulder Screw

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Part Number:313-31
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313-31 Bascule Bridge Crank Arm Shoulder Screw - The 313-31 shoulder screw is used on the 313-28 rotating member as Lionel referred to it in its drawings, more commonly known as a crank arm, which is fastened to the output shaft of the gear box and locked into place with a set screw. The connecting rod is then fastened to the rotating member (arm) using the 313-31 shoulder screw. We have original prewar as well as postwar versions of this shoulder screw. The prewar version has a 4-36 thread, while the postwar version has 6-32 thread. If you are replacing your shoulder screw, make sure to check which thread size you need and advise us accordingly.

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