


Flat Bit Attachment, 1/4-Inch Drive, Chrome Vanadium and S2 Steel (3-8mm)
Durable flat-blade bit attachment for 1/4-inch drives. Chrome vanadium socket with S2 steel bit. Nine sizes from 3mm to 8mm. Professional-grade construction for manual tool use.
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Flat Bit Attachment – 1/4-Inch Drive, Chrome Vanadium & S2 Steel
Brief Overview
This flat bit attachment combines a chrome vanadium steel socket body with an S2 steel flat-blade bit, designed specifically for manual ratchet and handle use. The 1/4-inch drive format integrates seamlessly into standard automotive and maintenance toolkits. Available in nine sizes from 3mm to 8mm, this attachment covers the most commonly required flat-blade applications. The knurled grip band on the socket body provides secure handling, while the precision-ground blade tip ensures reliable engagement with fastener slots. Pair this with compatible Phillips-head alternatives for a complete screw-driving accessory lineup.
Key Features
- Dual Material Construction: Chrome vanadium socket for durability; S2 steel bit for impact resistance
- Nine Size Options: 3mm, 3.5mm, 4mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, and 8mm
- 1/4-Inch Hex Drive: Universal compatibility with standard manual ratchets, impact drives, and quick-change holders
- Knurled Grip Band: Improves grip control and reduces slippage during manual operation
- Compact Profile: 37mm total length; 11.9mm outer diameter for accessibility in confined spaces
- Precision Flat Blade: Chamfered edges and consistent blade geometry reduce cam-out and fastener damage
Business Advantages for Resellers
- High-Volume SKU Opportunity: Nine distinct sizes from one product line maximize shelf utilization and order frequency
- Essential Accessory Tier: These attachments are consumed steadily in professional shops—predictable repeat orders
- Margin-Friendly: Manual tool accessories command consistent markup while remaining cost-competitive
- Versatile Market Appeal: Automotive technicians, maintenance crews, and hobby workshops all require flat-bit options
- Low Return Rate: Straightforward product category with minimal warranty claims
Technical Specifications
| Size (mm) | Part Number | Drive Shank (mm) | Socket OD (mm) | Blade Height (mm) | Total Length (mm) |
|---|---|---|---|---|---|
| 3 | 740203 | 11.9 | 11.9 | 18 | 37 |
| 3.5 | 740235 | 11.9 | 11.9 | 18 | 37 |
| 4 | 740204 | 11.9 | 11.9 | 18 | 37 |
| 5 | 740205 | 11.9 | 11.9 | 18 | 37 |
| 5.5 | 740255 | 11.9 | 11.9 | 18 | 37 |
| 6 | 740206 | 11.9 | 11.9 | 18 | 37 |
| 6.5 | 740265 | 11.9 | 11.9 | 18 | 37 |
| 7 | 740207 | 11.9 | 11.9 | 18 | 37 |
| 8 | 740208 | 11.9 | 11.9 | 18 | 37 |
Material & Build Quality
- Socket Body: Chrome vanadium steel, polished and knurled for grip and visual appeal
- Flat Blade Tip: S2 steel (high-carbon, impact-resistant alloy) for superior durability against slot deformation
- Drive Shank: Precision-machined hex geometry; rated for standard 1/4-inch quick-change holders and manual ratchets
- Finish: Factory-polished chrome plating resists corrosion and oxidation in typical workshop environments
Recommended Applications
- Automotive Service: Dashboard trim, electrical connector fasteners, interior panel screws
- Maintenance & Repair: General assembly, appliance servicing, precision equipment adjustment
- Electronics Assembly: Small-format fasteners requiring controlled, calibrated bit engagement
- Professional Workshops: High-reliability shops requiring consistent, dependable driver bits
Why Stock This Range
The 3–8mm flat-blade range covers approximately 85% of routine fastening tasks in automotive and general maintenance. Unlike single-size offerings, this nine-piece lineup ensures your customers can source complete solutions from one trusted supplier. The dual-material construction—chrome vanadium for the socket and S2 for the bit—balances cost efficiency with proven durability, making these attachments attractive to both budget-conscious technicians and quality-focused operations.
Order in bulk to build customer loyalty and ensure consistent inventory turnover in this essential accessory category.