HD-OEM: 16837-78Part Number: 8857-8 UOM: 8 - SET Summary:Cylinder base stud set are heat treated black studs with an interference thread.Fitment: FL 1978-1984 FX 1978-1984 FLT 1979-1983 FXR 1982-1983 Measurements: Length: 2-5/16" Country of Origin: USA