Rear Axle Adjuster Bolts 3/8-24 TPI. Chrome plated Sold in Pairs 3/8″ X 24TPI X 3″ long Fits 48-72 Harley Big Twin and custom applications, OEM 41576-36 Fits our Sportster and Shovelhead hardtail kits. *THESE ADJUSTERS ARE PLATED, CHASE THREADS PRIOR TO INSTALLATION TO REMOVE ANY BUILD UP. THIS WILL ENSURE PROPER FUNCTION.