All the above.
Measure clutch head across diameter.
McMaster Carr sells individual Irwin 1/4” hex drive bits in 3/32”, 1/8”, 5/32”, 3/16”, 1/4” nothing bigger.
The four piece screw driver set that the vendors sell 5/32”, 3/6”, 1/4” and 5/16” are all 1/32” under the nominal size, they fit very sloppy.
Don’t know of any 3/8”sizes that are used on the 1/2 or 3/4 ton trucks so the 5/16” size that Snap On sells would probably be the only one you need from them.
Clutch head bolts, screws; Restoration Specialties & Supply, Inc., P.O. Box 328, Windber, PA 15963,
www.restorationspecialties.com Denny Graham
Sandwich, IL
