Hex 4mm x 50mm Screwdriver Bit for Power Drills

Brief Overview

This is a single-piece hardened steel hex screwdriver bit designed for use in power drills, impact drivers, and manual bit holders. The 4mm hexagonal drive is commonly found in industrial fastening, assembly work, and maintenance applications. At 50mm in length, it provides extended reach for recessed or hard-to-access fastening points. The bit features a reduced-diameter locking groove near the shank end, ensuring secure retention in standard 1/4-inch hex chuck systems. If you work with varying hex sizes, consider stocking complementary bits like smaller 2.5mm variants or larger 5mm and 6mm options to cover your full fastening range.

Key Features

• Single-piece construction: Heat-treated steel provides durability and resistance to deformation
• 50mm length: Extended reach for recessed or difficult-to-access fastening points
• Hex 4mm drive: Standard industrial size for common machinery and assembly applications
• Detent groove: Secure locking mechanism for standard quick-change bit holders
• Matte metallic finish: Corrosion-resistant hardened tool steel
• Universal compatibility: Works with all standard 1/4-inch hex chuck power drills and impact drivers

Why This Matters for Your Shop

For distributors and professional shops, this bit size (Hex 4mm) fills a critical gap in fastening inventory. While 3mm and 5mm sizes dominate many shops, the 4mm drive is essential for specific industrial equipment, machinery assembly, and OEM applications. The 50mm length is particularly valuable for deep-set fasteners or confined spaces where standard shorter bits won't reach. Stocking this size ensures you can fulfill orders without delay and reduces the need for customer special orders.

The extended length also reduces the need for multiple bit changes, improving job efficiency and reducing downtime on assembly lines. One bit handles both standard and recessed applications, simplifying inventory management.

Technical Specifications

Specification	Detail
Hex Drive Size	4mm
Overall Length	50mm
Shank Type	1/4-inch hex (universal)
Material	Hardened tool steel
Finish	Matte metallic (heat-treated)
Locking Feature	Detent groove for secure retention
Compatible With	Power drills, impact drivers, quick-change bit holders

Bottom Line

This is a workhorse bit for shops that handle industrial fastening, assembly operations, or maintenance work requiring extended reach. The 4mm size may not be as universally stocked as 3mm or 5mm options, but that's precisely why resellers who stock it gain a competitive advantage. Bulk ordering this size—especially in the 50mm length—positions your shop as a reliable source for complete fastening solutions.