3/8″-16 Hex Bolts Grade 5 Zinc Plated Steel 1/2in 5/8in 1in Up to 9in All Sizes Hex cap screws are partially threaded and provide much tighter tolerance than their fully threaded counterparts. Hex bolts are the most common construction fastener having a hex head that can be secured with a socket or wrench and mated with a nut or another internally threaded item. General Product Information Head Style : Hex Head Drive Size : 9/16″ Thread : 3/8″-16 Material : Steel Finish : Zinc Grade Rating : Grade 5 Length : Select From Drop Down Menu Quantity of Fasteners in Package : Select From Drop Down Menu} Detailed Product Information: Head Height : 15/16″ Thread Diameter : .375″ Threads Per Inch (TPI) : 16 System of Measurement : Inch Thread Type : UNC Thread Style : Coarse Thread Specification Met : ASME : B18.2.1-2012 Key Notes: Hex cap screws are partially threaded and provide much tighter tolerance than their fully threaded counterparts. Hex bolts are the most common construction fastener having a hex head that can be secured with a socket or wrench and mated with a nut or another internally threaded item. Grade 5 is a Medium carbon steel that has been quenched and tempered to improve its strength making it one of the most commonly used grades in the automotive industry. Zinc is relatively economical and offers good corrosion resistance in environments not subject to excessive moisture. A clear or blueish chromate finish is applied on top of the zinc to provide additional protection against oxidation. External hex drives can be turned with an adjustable wrench, combination wrench and 6- or 12-point sockets and offers high torque transfer. Fastenere Brand Hex Bolts meet ASME : B18.2.1-2012 specifications for a product that is strong and reliable. Shipping: All orders placed before 3:30 pm EST Will Ship Same Day Tracking is provided on ALL Orders Priority Mail Shipping service is offered at a discount of only $3.95 UPS Ground UPS Next Day Air is available, Please inquire for pricing Returns : ALL returns are accepted if returned within 60 days. Money Back or exchange guaranteed. NO Restocking Fees. For YOU, we constantly strive to find ways of improving our performance.