Our Reduced Shank Hexagon Head Bolts and Screws with Coarse Thread are designed for straightforward and efficient assembly: Standard Hex Head: Compatible with commonly used wrenches and sockets for easy tightening. Coarse Thread: Offers quick engagement and strong holding power, suitable for high-speed assembly processes. Clear Shoulder: The transition between the head/shank and the threaded portion is usually well-defined, ensuring proper seating and clamping. Variety of Materials and Finishes: Available in various steel grades and surface treatments to meet specific automotive requirements for strength, corrosion resistance, and temperature tolerance. Key Advantages for Your Applications: Weight Savings: Contributes to overall vehicle weight reduction and improved fuel economy. Potential Cost Reduction: Less material usage in the shank can lead to lower manufacturing costs. Efficient Assembly: Easier initial alignment and faster thread engagement in some applications. Strong Holding Power: The coarse thread provides reliable fastening and resistance to loosening. Versatile Applications: Suitable for numerous non-critical alignment and fastening tasks where weight is a concern. Standard Tooling: Can be installed using standard hex wrenches and sockets. Ideal for: Attaching Non-Structural or Secondary Components: Fastening plastic trims, interior panels, and lightweight brackets where full shank strength is not required. Securing Components with Pre-Aligned Holes: Efficiently joining parts with precisely aligned holes where the shank primarily serves for guidance. Applications Where Weight Reduction is a Key Design Goal: Contributing to the overall lightweighting efforts in modern vehicle design. Certain Body Panel Attachments: Securing specific body panels or covers where a lighter fastener is sufficient. Assembly Line Efficiency: The coarse thread facilitates faster initial engagement in high-volume production. Product NameStandardMaterial & FinishDiameterLengthReduced Shank Hexagon Head BoltsGB/T 5784-1986Carbon Steel, Zinc PlatedM620 mmReduced Shank Hexagon Head BoltsGB/T 5784-1986Carbon Steel, DacrometM825 mmReduced Shank Hexagon Head BoltsGB/T 5784-1986Alloy Steel, Black OxideM1030 mmReduced Shank Hexagon Head BoltsISO 4015:202234CrMo4 Steel, GalvanizedM6 (1/4")1.5" (38.1 mm)Reduced Shank Hexagon Head BoltsISO 4015:202242CrMo4 Steel, PlainM8 (5/16")2" (50.8 mm)Reduced Shank Hexagon Head BoltsASME B18.2.3.9MASTM A490, Zinc Flake3/8" (9.525 mm)1.5" (38.1 mm)Reduced Shank Hexagon Head BoltsDIN 6922:1983C35 Steel, Hot-Dip GalvanizedM620 mmReduced Shank Hexagon Head BoltsDIN 6922:1983C45 Steel, PhosphatedM1030 mmReduced Shank Hexagon Head BoltsJIS B 1180:2014SCM435 Alloy Steel, Zn-NiM825 mmReduced Shank Hexagon Head BoltsQ 18035CrMo Steel, ElectroplatedM1240 mm