Overview Product Description Thread - UNC (Coarse) Material - Self Colour Steel Grade - 12.9 High Tensile Thread size - 1/2" - 13tpi Please select your length from the drop down lists above Product Videos Custom Field Product Reviews Write a Review Write a Review × 1/2" UNC Self Colour High Tensile Socket Cup Point Grub Screws Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *