www.Austin7Ulster.com › 5/16” BSF Nut - cylinder head etc 5/16” BSF Nut - cylinder head etc from £0.25 5/16” BSF Steel Nut for cylinder head studs etc 5/16” BSF Steel Nut for cylinder head studs etc Quantity: Select Quantity Set of 14 Price each Add To Cart Added! You Might Also Like Valve Chest Cork Gasket £2.30 Cylinder Block Base Shim / Spacer Plate (Thin Type) £8.99 Sold out Top Water Manifold Stud for Low Compression Head 5/16 BSF £1.80 Top Water Manifold Gasket (H.C. Type) (Cork Type) £1.10 1/2" Piston Gudgeon Pin (Clamped Type) £3.00