Threaded hole in top with screw in acorn nut and brass split washer. 12v Ignition coil.
Classic Car & Motorcycle HT Lead to Coil Acorn Nut Long & Contact, 105036C
Acorn Nut for Lucas Magnetos, LU410600 fits 7mm & 8mm Ht leads
Lucas type Long Acorn Nut Screw in Ignition Coil HT Lead for pre 1960 cars
LUCAS MAGNETO BTH PICKUP KIT 2 DISTRIBUTOR LEAD BOOT ACORN NUT LU45865 7mm & 8mm
LUCAS DISTRIBUTOR CAP ACORN NUT SET OF 5 GENUINE
Classic Car & Motorcycle HT Lead / Distributor Acorn Nut Short & Contact,17H5122