Steel Pinion Gear 1/8" Bore 48P 21T (RRP1021)

Durable 48-pitch steel pinion gear with 21 teeth and a 1/8-inch bore. Made from hard nickel-plated alloy steel, this precision-cut pinion is designed for long-lasting performance when paired with a plastic spur gear, and the tooth count is stamped on the gear for quick identification.

Includes a 5-40 set screw for secure mounting; a 1/16-inch hex wrench is not included but will fit the set screw. This pinion is intended for use with standard plastic spur gear setups in hobby gear trains that rely on 48P pinions.