Battery Bolts & Nuts, Square Head, 5/16". PART NO: A-26A1-B. Sold in multiples of 50 bolts/50 nuts only. Dim A (1)5/16" Square Head. 0. MODELS: (Miscellaneous) (Undefined): SEVERAL Allis-Chalmers TRACTOR: SEVERAL Case-IH TRACTOR: SEVERAL Ford / New Holland TRACTOR: SEVERAL John Deere TRACTOR: SEVERAL Massey Ferguson TRACTOR: SEVERAL White/ Oliver/ Mpl Moline TRACTOR: SEVERAL.