**5​/​16"-18 x 1-1​/​2" UNC Grade 5 Titanium Socket Head Machine Screw – Polished Finish** This **5​/​16"-18 x 1-1​/​2" UNC socket head machine screw** is manufactured from **Grade 5 titanium (Ti-6Al-4V)**, a premium aerospace alloy known for its outstanding combination of **high strength, low weight, and corrosion resistance**. Designed for demanding fastening applications, this titanium socket head screw is an excellent choice for **aerospace, marine, automotive, motorsports, industrial, and composite assemblies** where traditional steel hardware may add unnecessary weight or be vulnerable to corrosion. With its **socket head design** and **polished finish**, this titanium machine screw provides secure tool engagement, a clean finished appearance, and dependable performance in both structural and precision fastening applications. Grade 5 titanium is especially well suited for **carbon fiber and composite builds**, where corrosion compatibility and lightweight strength are essential. It is commonly used in **race cars, sailboats, powerboats, motorcycles, bicycles, engines, custom fabrication, and high-performance industrial equipment**. Manufactured to **ANSI B18.3 ​/​ ASME B18.3** standards, this **5​/​16-18 titanium socket head cap screw** is built for consistent fit, strong clamping performance, and long-term durability in harsh environments. For buyers searching for **titanium fasteners online**, this size is ideal for larger assemblies requiring a corrosion-resistant, non-rusting, lightweight fastener with aerospace-grade performance. **Product Specifications** * **Size:** 5​/​16"-18 * **Length:** 1-1​/​2 in * **Thread Type:** UNC * **Material:** Grade 5 Titanium (Ti-6Al-4V) * **Head Style:** Socket Head * **Finish:** Polished * **Standard:** ANSI B18.3 ​/​ ASME B18.3 * **Tolerance:** +0 ​/​ -0.003 in **Common Applications** * Aerospace and aviation hardware * Carbon fiber and composite assemblies * Marine and boating hardware * Motorsports and automotive builds * Bicycles, motorcycles, and performance upgrades * Industrial equipment and custom fabrication If you need a **lightweight, high-strength, corrosion-resistant titanium machine screw**, this **5​/​16"-18 x 1-1​/​2" Grade 5 titanium socket head screw** is a durable solution for structural, marine, automotive, and precision fastening applications.