Bolt: 3/8" UNF x 2" - BH606161 Made in England
Used in many locations. Some examples below.
5 x 2 Gearbox lid, Water pump on 2.8 and 3.8 engines, Clutch slave cylinder to pedal lever, Pivot bolt on the folding footplates fitted to the lightweight tractors
Always check size before ordering as some applications have different size bolts.