This package includes (10) 1/2"-13 X 6-1/2" Grade 8 Hex Head Cap Screw Bolts with a Yellow Zinc Plated Coarse finish. These bolts are made of high-quality steel and are designed with a National Coarse thread type and 13 Threads Per Inch pitch. The hex head style and 3/4" drive/wrench size make installation and tightening easy and efficient. The specification for these bolts is SAE J429 / ASME B18.2.1 and the model number is HHCS050-13X6500G8YZ-10. The thread size is 1/2" and the thread length is 1-1/2". These bolts are perfect for use in various industries such as Construction, Industrial, and Business settings.