Conversions Tech Copper Compression Lug – 3/0 AWG, 5/16" Stud (Non-Tinned / Bare Copper)
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SKU: 6221-030-0516-NP
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Conversions Tech Copper Compression Lug – 3/0 AWG, 5/16" Stud (Non-Tinned / Bare Copper)
The Conversions Tech Copper Compression Lug is a seamless tubular, heavy-duty electrical connector engineered for 3/0 AWG copper conductors and a 5/16" stud termination. Manufactured from high-purity bare (non-tinned) copper, this lug delivers low electrical resistance, high current-carrying capacity, and dependable mechanical performance for controlled or indoor power distribution applications.
- 3/0 AWG copper conductor range for high-current cabling
- 5/16" stud ring tongue for compact, secure bolted connections
- Seamless tubular barrel for uniform crimp compression and gas-tight terminations
- Bare copper (non-tinned) finish for maximum electrical conductivity
- Rated up to 600V for AC and DC power distribution
- Designed to perform under vibration and thermal cycling when properly installed
High-Current 3/0 Copper Lug for 5/16" Stud Terminations
This 3/0 AWG copper compression lug features a seamless tubular barrel that compresses evenly around the conductor, creating a gas-tight electrical interface with minimal contact resistance and high pull-out strength. This construction ensures long-term reliability in high-current electrical systems.
The 5/16" stud interface is commonly used where a compact footprint is required, such as battery terminals, bus bars, grounding points, and distribution blocks. The non-tinned copper construction makes this lug ideal for controlled indoor or protected environments where corrosion resistance is not required.
Key Features
- Seamless tubular copper barrel ensures consistent crimp performance
- Non-tinned (bare) copper for maximum electrical conductivity
- Designed for 3/0 AWG copper conductors
- 5/16" stud hole for secure bolted electrical connections
- 600V maximum voltage rating
- High mechanical strength suitable for vibration and thermal cycling environments
Technical Specifications
| Wire Range | 3/0 AWG |
|---|---|
| Stud Size | 5/16" |
| Stud Hole (Nominal) | 0.328" |
| Material | Seamless Copper (Non-Tinned) |
| Finish | Bare Copper |
| Maximum Voltage | 600V |
| Construction Type | Seamless Tubular |
| Application | Copper Cable Only |
Dimensions (inches)
For this 3/0 AWG seamless tubular lug series, lug body and barrel geometry remain consistent across stud sizes. Only the stud hole diameter changes for the 5/16" stud configuration.
| Overall Length (L) | 2.170" |
|---|---|
| Width (W) | 0.950" |
| Pad Thickness (T) | 0.102" |
| Tube Thickness (TT) | 0.055" |
| Barrel Length (BL) | 0.780" |
| Barrel Inside Diameter (ID) | 0.500" |
| Pad Length | 1.020" |
| Strip Length | 0.780" |
| Stud Hole (Nominal) | 0.328" |
Typical Applications
- Battery cables and high-current DC systems
- Bus bars and compact power distribution blocks
- Grounding and bonding systems
- Industrial and commercial electrical panels
- Controlled-environment electrical rooms
Installation Notes
- Use a hydraulic or dieless compression crimp tool rated for 3/0 AWG copper lugs.
- Strip insulation to the specified 0.780" strip length before crimping.
- For copper conductors only; do not use with aluminum wire.
- For outdoor or corrosive environments, use a tin-plated lug or seal with adhesive-lined heat shrink.
Frequently Asked Questions (FAQs)
What wire size is this compression lug designed for?
This lug is designed for 3/0 AWG copper conductors.
What stud size does this lug fit?
It fits a 5/16" stud with a nominal hole diameter of 0.328".
Is this lug tinned?
No. This version is non-tinned (bare copper).
What voltage rating does this lug support?
Rated up to 600V for AC and DC applications.
Is this lug suitable for aluminum wire?
No. This lug is intended for copper conductors only.
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.
