Copper Compression Lug 4/0 AWG 3/8" Stud | Seamless Tubular Non-Tinned
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SKU: 6221-040-038-NP
55 in stock
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The Copper Compression Lug is a seamless tubular electrical connector engineered for 4/0 AWG copper conductors and 3/8" stud terminations. Manufactured from bare (non-tinned) copper, this lug provides high-conductivity termination for battery cables, bus bars, switchgear, and industrial distribution blocks in controlled indoor environments.
The seamless barrel construction ensures uniform compression during crimping, reducing joint resistance while maintaining mechanical integrity under vibration and thermal cycling. The 3/8" stud interface with 0.390" nominal hole diameter accommodates standard hardware for secure bolted connections.
Specifications
- Wire Range: 4/0 AWG (copper only)
- Stud Size: 3/8"
- Stud Hole (Nominal): 0.390"
- Material: Seamless Copper (Non-Tinned)
- Finish: Bare Copper
- Maximum Voltage: 600V
- Construction Type: Seamless Tubular
- Overall Length (L): 2.360"
- Width (W): 1.000"
- Pad Thickness (T): 0.114"
- Tube Thickness (TT): 0.059"
- Barrel Length (BL): 0.840"
- Barrel Inside Diameter (ID): 0.551"
- Pad Length: 1.100"
- Strip Length: 0.830"
Cross-Reference
Equivalent to standard seamless tubular compression lug form factors used by major electrical manufacturers. Non-tinned bare copper construction matches industry-standard specifications for high-conductivity indoor terminations at lower distributor cost.
FAQ
What crimp tool is required for 4/0 AWG compression lugs?
Use a hydraulic or dieless compression crimp tool rated for 4/0 AWG copper lugs. Follow the tool manufacturer's die selection and compression force specifications to achieve proper crimp geometry.
Can this lug be used with aluminum conductors?
No. This lug is designed for copper cable only. Using aluminum conductors with copper lugs creates a dissimilar metal connection that requires proper transition connectors or antioxidant compounds not compatible with this product specification.
What is the difference between tinned and non-tinned copper lugs?
Non-tinned (bare) copper lugs offer maximum electrical conductivity and are specified for dry, indoor, or controlled environments. Tinned lugs provide corrosion resistance for humid, outdoor, or chemically exposed applications. This non-tinned version requires sealed termination or heat shrink for outdoor use.
Why Pros Buy Direct from Conversions Tech
Engineered in the USA. Our U.S.-based engineering team designs and specifies our core product lines, and every product we carry — designed in-house or built to our exact specifications by certified partner factories — is quality-verified before it ships. UL/CSA listed where required, NEC compliant.
Cross-reference savings. Direct equivalents to Burndy, Hubbell, and other OEM part numbers at up to 30% less — same specs, same certifications, without the big-brand markup.
Real technical support. Need a torque spec, die reference, or an OEM quote? You’ll speak directly with the Conversions Tech engineering desk — not a script reader — for instant answers, custom kitting, and private-label options.
Fast US fulfillment. Orders in by 2PM ET ship same day from our US warehouse, nationwide ground and expedited.
