Powermaster Starter Pinion- 10 Pitch 9210PL Nuts have 3/8"-16 threads

Nuts have 3/8"-16 threads

The old standard shims will not hold up to the extreme spring pressures and high RPM in today's race engines

Bolt-on style bumper fits most tubular and stock stubs

Weld-Together

5/16-18 in Gauge Bolt to 1-13/16-16 in Thread

Powermaster Starter Pinion- 10 Pitch 9210PL Nuts have 3/8"-16 threadsProduct Description: Starter Pinion Steel Powermaster Starters Sold Individually Powermaster produces alternators and starters for both street rod and racing applications. They also offer related accessories, including brackets, wiring harnesses, pulleys, and drive kits. Powermaster Motorsports is the leader in high performance alternators and starters for auto racing.