Specification Brand : Carr Lane Manufacturing BulletPoint1 : ID: 13mm BulletPoint2 : A Diameter Bushing: 1.3750/1.3746 BulletPoint3 : B Bushing: .455 BulletPoint4 : B Hole: .469/.471 BulletPoint5 : C: .688 ItemName : CL-13-CLFR Carr Lane Manufacturing Carr Lock Face Mount Receiver Bushing: ID 13mm ItemTypeKeyword : quick-disconnect-bushings Manufacturer : Carr Lane Manufacturing Material : 52100/1144 steel, heat treated Rc 58-64 MeasurementSystem : Metric MeasurementSystem1 : metric MeasurementSystem2 : inch PartNumber : CL-13-CLFR ProductDescription : The Carr Lock System requires that each Carr Lock Clamp be used together with either a Face-Mount or Back-Mount Receiver Bushing. The clamp's locking balls engage the angled ID section of the Receiver Bushing, pulling the clamp firmly downward. Made in USA. ProductSiteLaunchDate : 2013-11-04T04:25:37.565Z UnspscCode : 25170000