Vintage-style Hardware Traditional-style  Standard 20 TPI thread  Made of solid steel 3/8" size from point to point on rod Straight rigid-style spindle Product Description Specs An old-style threaded spindle rod for doorknobs. Made of solid steel, this spindle is sturdy & durable. This particular spindle has a size of 3/8" - 20 threads per inch (TPI), which is a standard & common size for many doorknobs. Excellent for your reproduction doorknobs, or just a replacement for your old chewed-up spindles. Available in several lengths.     Hardwick & Sons is pleased to offer vintage-style hardware for the many people who desire to fashion their homes with charm, quality, & style. The traditional-style hardware that we showcase are true & faithful reproductions of classic hardware pieces found in the many homes from across America throughout the past century. Product Point to Point Thread Size Overall Size Size of Spindle Square (measured on the flats) Model # Door Spindle 3/8" 20 TPI 3-1/4" Long 9/32" (7 mm) BMH8842-20X Door Spindle 3/8" 20 TPI 3-1/2" Long 9/32" (7 mm) BMH8850-20X Door Spindle 3/8" 20 TPI 4" Long 9/32" (7 mm) BMH8839-20X   For California Residents: WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood