(MM-173-JH)-nut (attaches 4A263 to axle) 5/16"-18 , STANDARD PART STANDARD PART "Before 10/88"
(MM-173-JH)-nut (attaches 4A263 to axle) 5/16"-18 , STANDARD PART STANDARD PART "From 07/89"
(MM-173-JH)-nut (attaches 4A263 to axle) 5/16"-18 , STANDARD PART STANDARD PART "From 10/88 to 07/89"