350 MCM Copper Compression Lug – 1-Hole, 5/8" Stud, Long Barrel | Conversions Tech
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350 MCM Copper Compression Lug – 1-Hole, 5/8" Stud, Long Barrel | Conversions Tech
The Conversions Tech 350 MCM Copper Compression Lug is engineered for high-current, heavy-duty electrical applications where strength, conductivity, and long-term reliability matter. Designed for 350 MCM copper conductors, this lug features a single 5/8-inch stud hole and a long barrel construction that delivers superior mechanical retention and low-resistance electrical performance.
Manufactured from seamless electro-tin plated copper, this tinned copper compression lug offers excellent corrosion resistance for indoor and outdoor environments. The red color code allows for fast visual identification, reducing installation time and minimizing errors in the field.
Key Features
- Premium Copper Construction: High-quality copper ensures excellent conductivity and long service life.
- 350 MCM Conductor Size: Precision engineered for 350 MCM copper wire used in high-load electrical systems.
- 1-Hole Pad with 5/8" Stud: Single mounting hole provides a secure and stable connection to bus bars and equipment.
- Long Barrel Design: Extended barrel length supports multiple crimps for enhanced pull-out strength and electrical contact.
- Tin-Plated Finish: Protects against corrosion and oxidation while maintaining low electrical resistance.
- Red Color Code: Enables quick identification and alignment with industry-standard color coding.
- High-Performance Durability: Built for demanding industrial, commercial, and utility-grade applications.
Common Applications
- Power distribution and switchgear
- Utility and substation installations
- Industrial electrical panels and equipment
- Renewable energy systems and battery banks
- Grounding and bonding systems using large copper conductors
Technical Specifications
| Material | Seamless Electro-Tin Plated Copper |
| Conductor Material | Copper |
| Conductor Size | 350 MCM |
| Stud Size | 5/8 Inch |
| Pad Holes | 1 |
| Barrel Type | Long Barrel |
| Barrel Entry | Chamfered |
| Color Code | Red |
| Overall Length | 3.873 Inch |
| Barrel Length | 2.0 Inch |
| Barrel Size (ID × OD) | 0.703 Inch × 0.89 Inch |
| Die Index | I-71 |
| Pad Size | 1.25" L × 1.291" W × 0.187" Thick |
| Voltage Rating | 35 kV |
| Temperature Rating | 90°C |
Frequently Asked Questions (FAQs)
What wire type is this compression lug designed for?
This lug is designed specifically for 350 MCM copper conductors. It is not intended for aluminum wire.
What is the benefit of a long barrel compression lug?
A long barrel allows for multiple crimps, increasing mechanical strength, reducing resistance, and improving long-term reliability.
What stud size does this lug fit?
This lug is designed for a 5/8-inch stud or bolt.
Why is the lug tin plated?
Tin plating protects the copper from oxidation and corrosion while preserving excellent electrical conductivity.
What does the red color code indicate?
The red color code corresponds to 350 MCM conductor size, allowing for quick visual identification during installation.
What crimping tool should be used?
Use a crimp tool rated for 350 MCM copper lugs and follow the recommended die selection, including Die Index I-71.
Is this lug suitable for outdoor use?
Yes. The tin-plated copper construction provides corrosion resistance suitable for indoor and outdoor environments.
What is the voltage rating?
This compression lug is rated up to 35 kV when properly installed.
What is the maximum operating temperature?
This lug is rated for continuous operation up to 90°C.
Where is this lug commonly used?
It is commonly used in power distribution equipment, utility systems, renewable energy installations, and high-current industrial applications.
4 Reasons Pros Buy Direct from Conversions Tech
, we design, test, and ship every product from inside the United States— “” quality without the big-box markup.
Our , mold, and QA station behind our weatherproof boxes, conduit bodies, and power inverters. , UL-listed safety, and up to 30 % lower cost than .
Need a torque spec or an OEM quote at dawn? You’ll speak directly with the Conversions Tech engineering desk—not a script reader—for instant answers, custom kitting, and private-label options.
Bottom line: For rugged, code-compliant electrical solutions shipped fast from a trusted U.S. source, choose Conversions Tech and build it right the first time.
