5/16" Pilot x 1/2" 100 Deg HSS 1/4-28 Threaded Shank Stop Countersink HOL26-25 Maximum Ambient Temperature: 2

Maximum Ambient Temperature: 2

Product Line: Proform Ford Racing Licensed Valve over Wing Bolts and Washers

454 or 502 big block engines

The “350” logo and chrome finish enhance the look of your engine bay

81002 LS1/LS2/LS6 Intake Manifold with 81008 Fuel Rails

5/16" Pilot x 1/2" 100 Deg HSS 1/4-28 Threaded Shank Stop Countersink HOL26-25 Maximum Ambient Temperature: 2Countersink cutters may be used in all popular adjustable or micro stop countersinking units utilizing a threaded shank drive. Made from the finest high speed tool steel. Precision ground to exacting tolerances and form relieved to insure concentricity of countersink angle Pilot diameter; 5 16" Body diameter: 1 2" Shank thread: 1 4 28 Included angle: 100 degrees