I only have some of the parts to hand right now to measure.
The short arms measure 7-7/8" as overall length.
The hand wheel (part # 5800946)diameter is 1-29/32" including the lumps for grip, 1-5/8" base diameter at rim. Hub diameter 11/16" (greater as it flares to meet the web). Centre hole threaded 5/16-18. Thickness at the hub 1/2". Thickness at rim 5/16". Web thickness 3/32", centred on the rim. (7/64 inset from rim each side).
Regretably, the bracket mounted to the windshield frame doesn't resemble a CMP part that I'm aware of. (but as above the bolt/stud must be 5/15-18) The reason I keep saying bolt/stud is that samples of early Cab 13 CMP brackets mounted to the cab frame were made from bolt brazed to the bracket but I believe later ones were a stud .
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