<h3>Key features</h3><ul> <li>Get 5 full fastener sets, each including a 1/2-13 x 3" fully threaded hex bolt, nut, flat washer, and lock washer. All you need is a standard 3/4" socket or wrench for quick and easy installation</li> <li>Precise Dimensions &amp; Fully Threaded for Flexibility: Features 1/2"-13 threads over the full 3" length (under-head). The 3/4" hex head provides a secure grip. Fully threaded design allows you to position and secure the nut at any point for ultimate adjustability in your projects</li> <li>Pro Tip for a Vibration-Proof Hold: For maximum security, first add the flat washer (protects surfaces), then the lock washer (resists vibration loosening), and finally tighten the nut. This professional sequence ensures a durable, rattle-free connection</li> <li>Constructed from premium 18-8 (A2-70) 304 stainless steel, offering superior corrosion and rust resistance. Ideal for demanding applications like decks, marine environments, garden fixtures, automotive parts, and high-humidity areas</li> <li>Versatile for Heavy-Duty and Everyday Projects: A reliable choice for automotive repairs, machinery, construction, fencing, furniture assembly, appliance maintenance, and countless DIY tasks. Combines industrial strength with the convenience of a pre-matched kit</li> </ul><p>SIZE: 1/2-13 x 3" Hex Bolt + Hex Nut + Flat Wahser + Lock Washer Specification: Bolt Thread Diameter 1/2" Bolt Head Width Measured From Flat to Flat 0.75 inch Bolt Head Height 0.32 inch Nut Size: 1/2-13 Flat Washer Size: 1/2" x 1-1/4" Outside Diameter Lock Washer: 1/2"-13 Package Included: 5 PCS Hex head cap screws are precision threaded fasteners with an External socket drive .They are known for their effecient application performance and endurance widely used in a variety of industries such as construction, manufacturing, engineering, assembling，aircraft and so on. The high quality 304 stainless steel provide perfect strength and good corrosion resistance in bad environments like high temperature, cold weather and high humidity areas without the need for time consuming and costly maintenance. Eastlo fastener hex cap screws meet the specific tolerance as described under ASME B18.2.1-1996 and guarantee to out live and out last all other grades of hardware where exposed to outdoor elements. Contact Us: If you have any questions when using, please feel free to contact us by Amazon message.</p><p>Free shipping included. 30-day hassle-free returns.</p>