HIROSUGI Brass Hex Standoff, Male/Female BSB-320E, 20mm, M3 x M3 HIROSUGI Brass Hex Standoff, Male/Female BSB-320E, 20mm, M3 x M3, Stud Length: 6mm, Hex Size Across Flat: 5.5mm, Finish: Nickel Plated GBP 5.32 1