Universal Dash Deluxe Knob for 1/4” Shaft RED Jewel Chrome Set Screw UP#23587 Mack and various trailers with

Mack and various trailers with 33mm diameter lug nuts and at least 3 exposed threads beyond the insert distance from the base which includes the lug nut (so you need lugs to show at least 3/8" above the nut to catch the treading inside the nut cover)

THE SWITCH FACE NUT HOLDS IT ON

Finish: Smooth metallic surface for secure threading and durability

Reduces Glare from Oncoming Traffic

and Columbia

Universal Dash Deluxe Knob for 1/4” Shaft RED Jewel Chrome Set Screw UP#23587 Mack and various trailers withMaterial: chrome aluminum Application: Kenworth, Peterbilt, Freightliner, Western Star, Mack, International IHC and others with 1 4 inch knob shaft Mount: remove old knob, push new knob on and tighten the screw with an Allen wrench (which is not included) Size: 1 1 4 inch diameter head, 1 1 8 inches tall, opening size is 1 4 inch Location: universal will work on wiper, washer, heater, fan, lights and many other knob shafts Style: jewel, deluxe Color: