Overview Product Description Thread size - 5/8" - 11 TPI UNC Grade - 12.9 High tensile steel zinc plated Type - Part threaded socket cap bolts Length - measured from under the head Product Videos Custom Field Product Reviews Write a Review Write a Review × 5/8" - 11 tpi UNC 12.9 ZINC SOCKET CAP BOLTS Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *