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Dark steel 50 mm hex screwdriver bit with stamped marking ASTA A-H4DE, 1/4" shank and 4 mm hex tipAngled view of dark hex bit, 4 mm tip on left, 1/4" shank on right, stamped ASTA A-H4DE

Hex Bit 1/4-Inch Shank, 50mm Length, 4mm Hex Driver

Precision hex driver bit with 1/4-inch hex shank for professional screwdriving. Industrial-grade steel construction.

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Description

Hex Bit 1/4-Inch Shank, 50mm Length, 4mm Hex Driver

Brief Overview

A dedicated hex driver bit engineered for precision fastening work in industrial and professional settings. The 1/4-inch hex shank integrates directly into standard bit holders and power tools, while the 4mm hex tip targets small to medium fasteners with exact engagement. Built from hardened steel with a durable black oxide finish, this bit resists corrosion and wear during repetitive use. This size occupies a critical position in any shop's inventory—pair it with complementary hex driver bits in larger sizes to cover your full fastening range, from precision assembly to general maintenance work.

Key Features

  • 1/4-Inch Hex Shank: Universal compatibility with quick-change bit holders, power drill chucks, and impact-rated tools
  • 50mm Overall Length: Extended reach for recessed or difficult-access fasteners without sacrificing control
  • 4mm Hex Driver Tip: Precision fit for M3 hex socket screws and small industrial fasteners
  • Black Oxide Finish: Corrosion-resistant coating reduces rust and extends tool life in humid shop environments
  • Retention Groove: Engineered relief near the shank end ensures secure seating in bit holders and prevents slippage
  • Hardened Steel Construction: Withstands repetitive driving forces without dulling or stripping

Business Advantages for Resellers

  • High-Velocity SKU: Hex bits in small diameters (2mm–5mm) are consumable-level fast movers in precision assembly shops
  • Bulk Pricing Opportunity: Standard pack quantities (25–100 units) allow competitive margin while meeting customer demand
  • Cross-Sell Potential: Build complete bit sets by offering 5mm and 6mm hex driver variants alongside this unit—drives larger order values
  • Low Inventory Footprint: Compact, stackable design maximizes shelf density and reduces storage costs
  • Professional Market Fit: Medical device assembly, electronics manufacturing, and precision engineering shops require multiple bit sizes—position as essential stock

Technical Specifications

Specification Value
Shank Type 1/4-Inch Hex
Driver Tip Size 4mm Hex
Overall Length 50mm
Material Hardened Steel
Surface Finish Black Oxide
Shank Grip Method Quick-Change Bit Holder / Drill Chuck
Designed For Hand Drills, Impact Drivers, Pneumatic Tools

Application Context

This bit excels in precision-driven environments:

  • Precision Assembly: Medical device, optics, and electronics manufacturing where fastener sizes demand exact engagement
  • Small Machinery Maintenance: Adjusting and repairing compact industrial equipment with hex socket fasteners
  • Tool & Die Work: Setting up jigs and fixtures that rely on M3 hex socket hardware
  • Automotive Detail Work: Interior trim and small component fastening in assembly or restoration shops

Closing Statement

Stock this bit as part of a complete hex driver set. Its versatile 50mm length and 1/4-inch shank make it a production-line essential for shops handling precision fastening. Order in bulk to support customer projects while maintaining strong margin—this is the kind of bit that drives repeat orders when you have it in stock and competitors don't.