Impact Socket 12-Point 27mm 1/2-Inch Drive, CR-MO Steel

Brief Overview

This is a professional-grade impact socket engineered for high-torque pneumatic impact applications. The 27mm 12-point design delivers reliable fastener engagement without cam-out, making it essential for automotive assembly, heavy equipment maintenance, and industrial fastening work. The CR-MO (chromium-molybdenum) steel construction absorbs impact energy without fracturing, providing the durability that shops demand from daily-use tools. Whether you're stocking a full 1/2-inch drive set or building a specialized collection, this socket pairs seamlessly with smaller 12-point impact sockets and larger hex sockets to cover a complete fastening range.

Key Features

• 12-Point Internal Profile: Grips fasteners at 12 contact points, reducing the risk of rounding compared to 6-point designs. Ideal for both hex and 12-point bolts.
• 1/2-Inch Square Drive: Universal compatibility with pneumatic impact wrenches, impact ratchets, and hand-held breaker bars across all major manufacturers.
• CR-MO Steel Construction: Chromium-molybdenum alloy absorbs shock loads without brittleness, maintaining structural integrity through thousands of impact cycles.
• Black Oxide/Phosphate Finish: Corrosion-resistant surface extends tool life in wet, salt, or high-humidity environments.
• Deep Socket Design: 78mm overall length accommodates recessed or captive bolt heads without interference.
• Cross-Drilled Retaining Hole: Allows secure attachment to impact wrenches using detent balls or retaining pins, preventing accidental socket loss.
• Chamfered Hex Opening: Smooth entry guides fasteners into the socket with minimal alignment effort.

Why Distributors Stock This Socket

High-Volume Appeal: The 27mm size is a bread-and-butter fastener in automotive, truck, and industrial maintenance. Shops buy these regularly—they're not one-time purchases. Reliable stock rotation ensures consistent turnover.

Margin Protection: CR-MO impact sockets command higher margins than standard steel alternatives because they deliver genuine durability. End-users understand the value and accept the price point.

Cross-Sell Opportunity: This socket is part of a complete 1/2-inch drive impact set. Customers who buy a 27mm socket are likely to add complementary sizes (12mm, 17mm, 21mm, 22mm) to fill gaps in their toolkit, increasing basket size and customer lifetime value.

Professional Credibility: Offering genuine CR-MO construction (not painted, not counterfeit) builds trust with professional buyers. Mechanics and fleet managers return to distributors who stock reliable tools.

Technical Specifications

Specification	Value
Socket Size	27 mm
Drive Size	1/2 inch (12.7 mm)
Internal Profile	12-Point
Material	Chromium-Molybdenum (CR-MO) Steel
Drive Recess Dimensions (D1)	38 mm
Maximum Diameter (D2)	30 mm
Wall Thickness (T)	13 mm
Overall Length	78 mm
Surface Finish	Black Oxide/Phosphate
Retaining Feature	Cross-Drilled Pin Hole
Part Number	544627P

Application Range

• Automotive Assembly & Service: Engine block fasteners, transmission bolts, differential carriers.
• Truck & Heavy Equipment: Wheel bolts, axle fasteners, chassis hardware.
• Industrial Maintenance: Structural bolts, machinery attachment points.
• Fleet Workshops: High-volume, repetitive fastening work where durability is non-negotiable.

Closing Statement

Stock this 27mm impact socket as a core item in your 1/2-inch drive inventory. It represents the standard fastener size in professional shops—a socket that moves, holds margin, and builds customer loyalty through proven performance under impact load.