250 MCM Copper Compression Lug – 1-Hole, 5/16" Stud, Long Barrel | Conversions Tech
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SKU: 210-98074A
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250 MCM Copper Compression Lug – 1-Hole, 5/16" Stud, Long Barrel | Conversions Tech
The Conversions Tech Copper Compression Lug is built for a reliable, low-resistance electrical connection in demanding power applications. Designed for 250 MCM copper conductors, this lug features a 1-hole pad, a 5/16-inch stud size, and a long barrel that provides additional crimp area for maximum pull-out strength and consistent conductivity.
Manufactured from seamless electro-tin plated copper, this tinned copper compression lug offers excellent corrosion resistance and long-term performance—ideal for industrial panels, utility work, renewable energy systems, grounding and bonding, and high-current distribution.
Key Features
- Seamless Tin-Plated Copper: Electro-tin plated copper enhances corrosion resistance while maintaining excellent conductivity.
- 250 MCM Conductor Size: Precision fit for 250 MCM copper cable used in high-current power distribution.
- 1-Hole Pad: Clean, simple installation with a single mounting hole for secure termination.
- 5/16" Stud Size: Designed to fit standard 5/16-inch bolts commonly used in electrical equipment and bus bars.
- Long Barrel Design: Extra barrel length supports multiple crimps for higher mechanical strength and improved electrical contact.
- Chamfered Barrel Entry: Helps guide stranded conductors into the barrel for faster, cleaner installs.
- High Performance Ratings: Rated up to 35 kV and 90°C for dependable operation in demanding environments.
Common Applications
- Power distribution panels and switchgear
- Renewable energy systems (solar combiner boxes, inverters, battery banks)
- Industrial equipment and motor controls
- Utility and commercial electrical installations
- Grounding and bonding systems using copper conductors
Technical Specifications
| Material | Seamless Electro-Tin Plated Copper |
| Conductor Material | Copper |
| Conductor Size | 250 MCM |
| Stud Size | 5/16 Inch |
| Pad Hole(s) | 1 |
| Barrel Type | Long |
| Barrel Entry Type | Chamfered |
| Color Code | Yellow |
| Overall Length | 2.731 Inch |
| Barrel Length | 1.5 Inch |
| Barrel Size | 0.39 Inch ID × 0.515 Inch OD |
| Die Index | I-42 |
| Pad Size | 0.875" L × 0.738" W × 0.125" Thick |
| Voltage Rating | 35 kV |
| Temperature Rating | 90°C |
Frequently Asked Questions (FAQs)
Is this lug for copper or aluminum wire?
This lug is designed for copper conductors. For aluminum wire, use an aluminum-rated or bi-metal lug.
What does 250 MCM mean?
250 MCM refers to a conductor cross-sectional area of 250 thousand circular mils, commonly used for higher-current electrical systems.
What is the benefit of a long barrel compression lug?
A long barrel allows for multiple crimp points, improving pull-out strength, reducing resistance, and increasing reliability.
What bolt size fits this lug?
This lug is designed for a 5/16-inch stud/bolt.
What does “1-hole” mean?
It means the pad has one mounting hole for attaching to a terminal stud, bus bar, or equipment connection point.
Why is the lug tin plated?
Tin plating helps prevent oxidation and corrosion while maintaining strong conductivity—especially important in humid or outdoor environments.
What crimp tool should I use?
Use a crimp tool rated for 250 MCM copper lugs and follow the proper die selection. This lug references Die Index I-42.
What does “chamfered entry” do?
A chamfered entry helps guide stranded copper into the barrel, reducing strand damage and speeding up installation.
What is the temperature rating?
This lug is rated to 90°C when installed correctly in an appropriate electrical system.
What is the voltage rating?
This lug is rated up to 35 kV, supporting a wide range of power distribution applications.
Where is this lug commonly used?
It’s commonly used in power distribution panels, switchgear, renewable energy systems, industrial equipment, and high-current copper terminations.
4 Reasons Pros Buy Direct from Conversions Tech
Headquartered in business-friendly Wyoming, we design, test, and ship every product from inside the United States—delivering genuine “Made-for-America” quality without the big-box markup.
Our in-house team owns every CAD file, mold, and QA station behind our weatherproof boxes, conduit bodies, and power inverters. Vertical control means tighter tolerances, UL-listed safety, and up to 30 % lower cost than private-label imports.
Thousands of SKUs sit ready to go. Orders placed by 2 p.m. ship the same day, keeping contractors, OEMs, and distributors on schedule.
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.
