www.Austin7Ulster.com › Cylinder Block - STEPPED Base Stud 3/8" to 5/16BSF Cylinder Block - STEPPED Base Stud 3/8" to 5/16BSF £3.20 STEPPED Crankcase to Cylinder Block 3/8” BSF to 5/16” BSF. STEPPED Crankcase to Cylinder Block 3/8” BSF to 5/16” BSF. Add To Cart Added! You Might Also Like Top Water Branch Manifold £15.99 Carburettor to Manifold Gasket 1923-1932 £0.60 Slipper Pistons set of 4 £275.00 Set of 8 Big End Bolts - for white metal rods £51.20 Stainless Steel Long and Short Side Water Manifold Studs 5/16 BSF £5.50