ITEM: 3/410 UNC Thread, Black Oxide Finish, Steel Round Knurled Check Nut JERGENS. MANUFACTURER: JERGENS. BRAND: Jergens. MANUFACTURER PART: 28104. 3/410 UNC Thread, Black Oxide Finish, Steel Round Knurled Check Nut 9/16 Overall Height, 13/4 Head Diam, 11/2 Base Diam (MOQ1, Pkg Qty1)CATEGORIES: Maintenance, Repair and Operational (MRO) Supplies. Nuts. Thumb & Knurled Nuts. N/A. KEYWORDS: JergensNutsThumb & Knurled NutsN/AN/A.