Valve Cover Nut, Acorn Head Valve Cover Nuts, Acorn Head Valve Cover Nuts; 1/4 in.-20 x 1 3/8 in. Nuts; Hex Head; 1/4 in.-20 x 7/8 Studs; 8 pc.;, Machined from solid steel, these chrome plated nuts are 1 3/8 inches all with 1/4 in. to 20 thread. Kit includes 8 acorn nuts with studs., Solid Steel, Chrome Plated, Engine Valve Cover Bolt