1/4 5/16 3/8 7/16 1/2 UNC COARSE HEXAGON BOLTS PART THREADED A2 STAINLESS STEEL. 8.8 High Tensile Zinc Plated.
Thread Diameter - 1/4" UNC Pitch - 20 threads per inch (tpi) Spanner Size - 7/16". Thread Diameter - 5/16" UNC Pitch - 18 threads per inch (tpi) Spanner Size - 1/2". Thread Diameter - 3/8" UNC Pitch - 16 threads per inch (tpi) Spanner Size - 9/16". Thread Diameter - 7/16" UNC Pitch - 14 threads per inch (tpi) Spanner Size - 5/8". Thread Diameter - 1/2" UNC Pitch - 13 threads per inch (tpi) Spanner Size - 3/4". The item must be unused and in its original packaging. We are here to help and will work to resolve any issues promptly. Please note that this service is available at an additional cost.