3-1/4" Set-Screw Type Shaft Collar, Steel-Zinc Plated - 6L304P2" Simple and economical Available in steel and stainless steel Set Screw Collars are the oldest type of shaft collar. These units function by gouging the set screw into the surface of a soft shaft. They are a low cost answer when frequent adjustment is not a consideration. Stocked in: Steel Plain finish Steel Black Oxide finish Steel Zinc Plated Stainless Steel Standard Series offers economy priced versions (6LXXXP2 and 34SXXX parts). Specifications