UNC 3/8" Socket Screw Countersunk High Tensile 10.9 DIN7991

UNC 3/8" Socket Screw Countersunk High Tensile 10.9 DIN7991 UNC 3/8" (16 T.P.I.), Coarse Pitch, High Tensile (Grade 'S'/ 8.8), Self Colour. This space of unthreaded area confirms that the fastener is now a bolt (socket countersunk bolt in this case) and is shouldered.