Overviewextra-Hard 32 Pitch Pinions Are A Must For Use With Our Steel Spur Gears And Will Last And Last With Plastic Spur Gears. Pinion Is Stamped With Tooth Number. 1/8 Inch Bore. One 5-40 Set Screw Included. 1/16 Inch Allen Wrench (Not Included) Fits The 5/40 Set Screw.
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