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Angled view of a 1/4" hex driver bit with ASTA logo and multi-spline tipSide perspective of ASTA hex shank bit with machined multi-spline tipEnd-on view showing flat face and radial multi-spline tip with ASTA-marked hex shank

M5 Spline Hex Drive Bit, 1/4-Inch Shank, 25mm Length

Precision M5 spline driver bit with 1/4-inch hex shank for compact fastening applications. Hardened steel construction.

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Description

M5 Spline Hex Drive Bit, 1/4-Inch Shank, 25mm Length

Brief Overview

This compact M5 spline driver bit is engineered for precision assembly and fastening work where space efficiency matters. The 1/4-inch hex shank integrates seamlessly into standard impact drivers and manual bit holders, making it an essential addition to any professional toolkit. Whether you're stocking bits for your shop or building out a complete driver bit system, this component pairs well with M6 spline alternatives and larger T-series variants for a rounded inventory.

Key Features

  • M5 Spline Geometry: Multi-flute spline profile (approximately 10–12 evenly spaced grooves) engineered to grip M5 spline fasteners securely without cam-out or slippage
  • 1/4-Inch Hex Drive Shank: Standard 1/4" hexagonal drive compatible with all universal bit holders, impact drivers, and manual driver handles
  • Compact 25mm Length: Short overall length ideal for tight assembly spaces, confined fastening positions, and precision work requiring close tool access
  • Hardened Tool Steel Construction: Single-piece, shot-blasted finish with uniform grey satin appearance provides durability and corrosion resistance in demanding shop environments
  • Retention Notch: Small dimple on the hex body ensures positive bit retention in quick-change holders and prevents accidental ejection during use

Why Resellers Choose This Bit

Stock Flexibility: M5 spline fasteners are increasingly common in precision assembly, electronics housing, and OEM automotive applications. By carrying this bit, you meet demand from shops that assemble or service equipment using M5 fastening standards—a gap many generic kits leave unfilled.

Complementary Inventory: This 25mm bit pairs naturally with your existing M6 and Torx collections, allowing you to upsell complete driver sets rather than individual bits. Customers upgrading their tool kits will expect the full range.

Durability & Margin: Hardened steel construction means lower return rates and higher customer satisfaction, protecting your reputation and improving repeat orders.

Technical Specifications

Specification Detail
Drive Type M5 Spline (10–12 flutes)
Hex Shank Size 1/4 inch (6.35mm)
Bit Length 25mm
Material Hardened Tool Steel
Finish Shot-blasted, Satin Grey
Construction Single-piece, Solid Metal
Retention Positive-grip notch for quick-change holders

Bottom Line

A straightforward, reliable spline driver bit designed for shops and distributors who understand that precision fastening demands the right tool. Stock it as part of a comprehensive bit collection, and you'll capture orders from assembly houses, maintenance facilities, and OEM service departments that standard bit sets simply don't serve.