Overview Product Description Grade 5 High Tensile Zinc plated steel Thread size - 1"- 8 tpi Thread - UNC Length - Measured from under the head. Product Videos Custom Field Product Reviews Write a Review Write a Review × 1" UNC 8.8 High Tensile Zinc Plated Steel Hex Head Bolts Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *