PurposeUsed to torque bearing retention nut 69-77143 on 737-400SpecificationANSI B92.1Overall Length1.12Wrench End TypeInternal Involute SplineWrench Body TypeStraightWrench VariationStandardDrive TypeInternal SquareDrive Size3/4Used WithTorque WrenchWhere Used737-400Fastener Number69-77143Number of Teeth41Spline Pitch10/20Pressure Angle30