3/8” x 1” UNC Thread Hexagon Imperial Bolts Spanner / Socket Size: 9/16” Tapping Drill Size: 8mm Thread Length: 1” Diameter: 3/8” Grade: ANSI B18.2.1.1965 Grade 8.8 Equivalent Class 8.8 - Medium Carbon Steel, Quenched and Tempered High Tensile Strength Zinc Plated T007-381
