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                                                                                Thread Size | 
                                                                        N/A 39 x 4.00 mm | 
                                                                                Nominal Hex Size (A) | 
                                                                        N/A 60 mm | 
                                                                                Thickness (B) | 
                                                                        N/A 39.0 mm | 
                                                                                Width Across Corners, MIN. (C) | 
                                                                        N/A 66.44 mm | 
                                                                                Hex Height (D) Minimum | 
                                                                        N/A 27.0 mm | 
                                                                                M - Material Options | 
                                                                        N/A 4 - 0.23 Max Carbon Steel 5 - Medium Carbon Steel 7 - Stainless Steel B - 360 Half Hard Brass H5 - Medium Carbon Steel, Heat Treated | 
                                                                                F - Finish Options | 
                                                                        N/A 0 - Black Oxide 1 - Zinc & Clear 1Y - Zinc & Yellow 2 - Cad 3 - Phos & Oil 9 - Plain |