KINCROME KC359C Deep Socket 3/4" 3/8" Drive

Chrome vanadium deep socket with double hex design—delivers reliable 3/4-inch fastener access in confined spaces with 3/8-inch drive compatibility for professional and workshop use.

Product Overview

The Kincrome KC359C is a 3/4-inch (19mm) deep socket with 3/8-inch drive square manufactured from chrome vanadium steel for professional workshop and trade applications. The deep socket design provides extended reach for recessed fasteners, long bolt threads, or applications where standard-length sockets can't engage nuts fully—common in automotive suspension work, machinery maintenance, and equipment assembly. Chrome vanadium construction undergoes heat treatment (hardening and tempering) for optimal strength and wear resistance, then receives chrome plating and polishing for corrosion protection in Australian workshop environments where moisture, oils, and chemicals accelerate tool degradation. The double hex (12-point) internal profile engages hex fasteners at 30-degree increments—provides twice the positioning options compared to 6-point sockets, valuable in tight spaces where ratchet swing arc is limited. Chamfered ends guide sockets onto fasteners easily, while knurled exterior finish improves grip in greasy or oily conditions typical of automotive, agricultural, and industrial maintenance work. Manufactured to DIN 475, 3121, and 3120 international standards, the KC359C meets quality benchmarks for dimensional accuracy, strength, and durability expected in professional-grade hand tools.

Key Specifications

• Product: Deep socket (extended length)
• Part number: KC359C
• Brand: Kincrome
• Socket size: 3/4 inch / 19 mm
• Drive size: 3/8 inch (9.5 mm square drive)
• Socket type: Deep (extended length for recessed fasteners)
• Internal profile: Double hex (12-point)
• Material: Chrome vanadium steel (CrV)
• Heat treatment: Hardened and tempered
• Finish: Chrome plated and polished
• Corrosion resistance: Chrome plating protects against rust
• Chamfered ends: Yes (positive nut location)
• Exterior finish: Knurled (improved grip in oily conditions)
• Standards compliance: DIN 475, 3121, 3120
• Manufacturing origin: Kincrome Australia specifications

Features & Benefits

Chrome Vanadium Steel Construction
CrV steel alloy provides superior strength-to-weight ratio compared to carbon steel—resists deformation under high torque loads typical in professional workshop use. The material's toughness prevents socket cracking or splitting when subjected to impact wrenches, breaker bars, or aggressive fastener removal in corroded automotive applications.

Hardened and Tempered Heat Treatment
Controlled heat treatment process hardens the socket for wear resistance while tempering maintains ductility to prevent brittleness—critical balance ensures the socket withstands repeated use without rounding internal corners or shattering under shock loads. This treatment extends service life significantly compared to unhardened sockets that wear rapidly in daily workshop use.

Deep Socket Design for Recessed Fasteners
Extended length accommodates long bolt threads, recessed nuts, or fasteners surrounded by protruding components—essential for suspension bolts with extended threads, engine bay applications where clearance is limited, or machinery maintenance requiring deep reach. Eliminates the need for socket extensions that increase wobble and reduce torque transfer accuracy.

Double Hex (12-Point) Internal Profile
12-point design engages hex fasteners at 30-degree increments—doubles positioning options compared to 6-point sockets, allowing ratchet operation in confined spaces where only 15-degree swing arcs are possible. Particularly valuable in engine bays, undercarriage work, or equipment panels where obstruction prevents full ratchet rotation.

Chamfered Entry for Positive Nut Location
Bevelled socket opening guides the socket onto fastener heads easily—reduces fumbling and misalignment during one-handed operation or overhead work. The chamfer also prevents socket edges from catching on threads or damaging fastener heads during installation, maintaining fastener integrity for future disassembly.

Knurled Exterior Finish
Machined knurl pattern on socket exterior provides tactile grip in greasy, oily, or wet conditions—maintains control during hand-threading or positioning before ratchet engagement. Critical for automotive technicians working with oil-covered engine components or agricultural mechanics handling equipment in muddy field conditions.

DIN Standards Compliance
Manufactured to DIN 475 (drive square dimensions), DIN 3121 (socket tolerances), and DIN 3120 (hex socket specifications) ensures dimensional accuracy and strength requirements—guarantees compatibility with international-standard ratchets, extensions, and accessories. Compliance provides confidence in tool interchangeability across brands and professional reliability.

Technical Specs

• Product type: Deep socket
• Part number: KC359C
• Manufacturer: Kincrome (Australia specifications)
• Socket size: 3/4 inch / 19 mm (across flats)
• Drive size: 3/8 inch / 9.5 mm square drive
• Socket length: Not specified (deep socket, typically 50-70mm longer than standard)
• Internal profile: Double hex (12-point)
• Material: Chrome vanadium steel (CrV alloy)
• Heat treatment: Hardened and tempered
• Surface finish: Chrome plated, polished
• Corrosion protection: Chrome plating (multi-layer)
• Chamfer: Bevelled entry both ends
• Exterior finish: Knurled for grip
• Wall thickness: Not specified (professional-grade expected)
• Standards: DIN 475, DIN 3121, DIN 3120
• Hardness: Not specified (typical HRC 38-42 for sockets)
• Torque rating: Not specified (professional-grade expected)
• Weight: Not specified

Compatible With / Goes Well With

Drive Tools (3/8-Inch Drive):

• 3/8-inch drive ratchets (fine-tooth, standard, or quick-release)
• 3/8-inch drive breaker bars (for high-torque applications)
• 3/8-inch drive torque wrenches (for precision fastening)
• 3/8-inch drive extensions (for additional reach)
• 3/8-inch drive universal joints (for angled access)

Fastener Applications:

• 3/4-inch / 19mm hex bolts and nuts
• Automotive suspension bolts (common size for control arms, struts)
• Machinery mounting bolts
• Agricultural equipment fasteners
• Industrial machinery assembly/disassembly

Complementary Tools:

• Kincrome socket sets (matching drive size)
• Socket organizers and rails
• Socket adapters (3/8-inch to 1/2-inch or 1/4-inch)
• Penetrating oil (for seized fasteners)
• Anti-seize compound (for reassembly)

Workshop Applications:

• Automotive repair and maintenance
• Agricultural machinery servicing
• Industrial equipment maintenance
• Construction equipment repair
• General mechanical assembly work

Note: Deep sockets provide extended reach but have greater leverage arm than standard sockets—exercise caution when applying high torque to prevent fastener over-tightening or breakage. For precision torque specifications, verify deep socket length doesn't interfere with calibrated torque wrench accuracy.

Frequently Asked Questions

What's the difference between 6-point and 12-point (double hex) sockets?

6-point sockets engage only the flat sides of hex fasteners, providing maximum contact area and torque transfer—best for high-torque applications or rounded fasteners. 12-point (double hex) sockets like the KC359C engage at 30-degree increments, allowing use in tighter spaces where ratchet swing is limited. For stuck or corroded fasteners requiring maximum force, 6-point is preferable; for general use with space constraints, 12-point offers positioning flexibility.

Will this socket work with impact wrenches?

The KC359C is a chrome-plated hand socket—while chrome vanadium steel is strong, chrome sockets are not designed for sustained impact wrench use. Impact tools require impact-rated sockets (typically black oxide or phosphate finish) with different heat treatment that absorbs shock loads without fracturing. Using hand sockets with impact wrenches can cause chrome plating to crack, flake, or the socket to shatter. For impact applications, purchase Kincrome impact-rated socket sets.

How much longer is a deep socket compared to standard sockets?

Deep sockets are typically 50-70mm longer than standard-length sockets of the same size. This extra length allows engagement with recessed nuts, long bolt threads, or fasteners surrounded by protruding components. If you need the socket dimension for clearance verification, contact Frankies Auto Electrics for exact length specifications of the KC359C.

Is this socket metric or imperial?

The KC359C is a 3/4-inch socket (imperial measurement), which closely corresponds to 19mm metric. While 3/4-inch and 19mm are nearly identical, they're technically different standards—3/4-inch is 19.05mm. For critical applications requiring precise fit, verify whether your fastener is imperial or metric before selecting sockets. Most 3/4-inch sockets will work adequately on 19mm fasteners and vice versa.

Does the chrome plating affect socket durability?

Chrome plating provides corrosion resistance but is harder and more brittle than the underlying steel—repeated high-stress use can cause chrome to crack or flake, though this doesn't affect socket structural integrity. The CrV steel beneath the chrome retains its strength and hardness. For extended professional use in harsh environments, inspect chrome condition periodically and consider impact-rated sockets (black finish) for extreme-duty applications where chrome degradation is accelerated.