The Fisher & Western 67158 is a genuine 1/4-20 x 1 inch thumb screw, made from durable stainless steel for corrosion resistance in harsh conditions. This essential OEM replacement part is used to secure components like the conveyor or spinner motor cover on various Fisher and Western hopper spreaders, including the Poly-Caster and Tornado series. Its user-friendly design allows for quick adjustments and ensures a secure fit, helping maintain peak performance and preventing damage to your equipment.