The STS Parts Single Groove Deep V-Belt Pulley is a premium replacement pulley for Delco and Ford alternators used in automotive, marine, and industrial equipment. This 1V deep groove pulley fits standard 17mm alternator shafts and is machined from cold-rolled steel for excellent strength, balance, and long-lasting performance. Ideal for Chevy classics like Chevelle, Camaro, and Nova, as well as Allis Chalmers and New Holland tractors, this pulley supports Delco alternator models including 10DN, 10SI, 12SI, 15SI, and 27SI, and Ford 1G/2G systems. Technical Specifications: Part Type: Alternator Pulley Pulley Type: Single Groove (V1) Material: Cold-Rolled Steel (machined) Belt Width: 10mm Outside Diameter (OD): 64–67mm Shaft Diameter: 17mm Hub to Groove: 13mm Rotation: BI (Bi-directional) Condition: 100% New Mount Type: Bolt-On Replaces OEM / Cross-Reference Numbers: C5AZ10344K, ADR5019, 10476394, 1893675, 1939845, 1949355, 1949356, 1949357, 1970757, 24-1100-1, Lester 7195, 7802 Fits Alternator Units: Delco: 1100186, 1102938, 1103113, 1103193, 1105064, 1105078, 1105097 Ford: 1G, 2G Hyster: 3042505, 341675 Prestolite: 20115005TBA OMC Marine: 982364 Applications: Chevrolet: Chevelle, Camaro, Nova, Astro, Blazer, P20/P30, Suburban (V6/V8) GMC: Jimmy, P2500 (1980s–1990s) Allis Chalmers / New Holland Tractors: C35–C120, D-series MerCruiser Marine Engines: Model 120, 140, 3.0LX Industrial / Agricultural: Various Continental and Waukesha engines Package Includes 1 × Single Groove Deep V-Belt Alternator Pulley (Cold Rolled Steel, 17mm bore)