360NH-R20RX, Huck 360 Inch Nuts, Huck, Huck360 Powerbolt Lockbolts, Body Finish : Zinc Red Dyed Trivalent Chromate & Huckguard, Across Corners Dimension : 1.202 Inch (30.53mm);, Across Flats Dimension : 1.047 Inch (26.59mm), Grade : 8, Nut Inner Diameter : 0.581 Inch (14.76mm), Nut Height : 0.750 Inch (19.05mm), Nut Type : Straight Hex, Material Detail : Low Carbon Steel, Unit of Measure : Inch, Tensile Strength : 33900 lbf. (150.79kN), Style : 63253, RoHS Compliant : 1295, Nominal Diameter [Metric] : 15.87mm, Fractional Diameter : 5/8 Inch, Decimal Equivalent Diameter : 0.625 Inch, Finish Detail : Zinc Electroplated, Red Dyed Trivalent Chromate, Plus One Coat LTX Clear, ASTM B-633, 0.0004 Inch, Body Material : Steel, Type : Vibration Resistant