3/8x1 1/2 UNC HT CUP HD BOLT ZP GR 5
Nuts not included
Commonly known as a Coach Bolt, (not to be confused with a Coach screw)
Thread = 16 TPI (Thread per Inch)
UNC (Unified National Coarse Thread)
Head Width Approx = 20mm
Medium Tensile Grade 5
Standard ASME B18.5
Zincplated Finish