www.Austin7Ulster.com › 5/16” BSF Barrel Nut - block to crankcase studs 5/16” BSF Barrel Nut - block to crankcase studs £2.50 5/16” BSF Steel Nut for crankcase studs 5/16” BSF Steel Nut for crankcase studs Add To Cart Added! You Might Also Like Gearbox selector ball & spring £1.50 Set of 14 cylinder head nuts and washers £2.99 Carburettor to Manifold Gasket 1923-1932 £0.60 1 x Valve Guide - Parallel Type from £5.00 Starter Dog / Crankshaft Tab / Lock Washer £0.65