ITEM: 11/2 Screw, Steel Standard Flat Washer JERGENS. MANUFACTURER: JERGENS. BRAND: Jergens. MANUFACTURER PART: 31966. 11/2 Screw, Steel Standard Flat Washer 19/16 ID x 23/4 OD, 1/4 Thick, Black Oxide FinishCATEGORIES: Maintenance, Repair and Operational (MRO) Supplies. Washers & Shims. Flat & Square Flat Washers. N/A. KEYWORDS: JergensWashers & ShimsFlat & Square Flat WashersFlat WashersN/A.