250 KCM Long Barrel Copper Lugs | One Hole 1/2″ Stud | Yellow Color Coded Sealed Terminal
PRODUCT PARAMETERS
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Extended Long Barrel Design: Provides double the crimping surface area compared to standard barrels, ensuring maximum mechanical pull-out strength.
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99.9% High-Conductivity T2 Copper: Seamless construction delivers ultra-low electrical resistance and superior power transmission.
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Sealed Barrel (No Inspection Window): Completely closed design prevents moisture, salt spray, and corrosive dust from entering the connection point.
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Yellow Color Coded (Die Index 62): Industry-standard visual identification for 250 MCM wire ensures rapid and error-free tool/die matching.
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Electro-Tin Plated Surface: Robust protective coating prevents oxidation and maintains electrical integrity in harsh industrial environments.
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One-Hole 1/2" Stud Versatility: Standard mounting hole compatible with most heavy-duty busbars and electrical equipment terminals.
Description
Shop XLUIG 250 KCM Long Barrel Copper Lugs. High-purity T2 copper, 1/2″ stud one-hole design, yellow color coding (Die 62). Sealed barrel without inspection window for maximum environmental protection.
Dimensions

Data Overview
| XLUIG Model No. | Wire Size (KCM) | Stud Hole Size | Barrel Type | Color Code | Die Index | W (mm) | B (mm) | L (mm) |
| XL-250-10-L | 250 KCM | 3/8″ | Long Barrel | Yellow | 62 | 27.7 | 41.3 | 82.5 |
| XL-250-12-L | 250 KCM | 1/2″ | Long Barrel | Yellow | 62 | 27.7 | 41.3 | 88.6 |
| XL-250-16-L | 250 KCM | 5/8″ | Long Barrel | Yellow | 62 | 27.7 | 41.3 | 96.5 |
Product Features & Engineering Logic
| Engineering Excellence | Operational Advantages | Professional Business Value |
| Enhanced Long Barrel Geometry | Allows for multiple crimps along the barrel, creating a larger and more secure contact zone with the 250 KCM conductor. | High-Stress Reliability: Perfect for applications subject to tension or vibration, reducing the risk of catastrophic cable pull-out. |
| Full-Sealed Seamless Tube | Eliminates the inspection port to create a gas-tight environment once crimped and heat-shrunk. | Extended Service Life: Ideal for marine, oil & gas, or chemical plants where internal conductor corrosion can lead to system failure. |
| Electrolytic T2 Copper Material | High ductility ensures the copper flows perfectly during compression without any micro-cracking in the barrel. | Energy Savings: Reduces heat generation at the joint, improving overall system efficiency and protecting expensive power components. |
| Yellow/62 Visual ID System | Provides instant verification for installers and inspectors that the correct terminal and Die Index 62 were utilized. | Regulatory Compliance: Simplifies safety audits and project handovers by following standardized NEC/NEMA color-coding protocols. |
FAQs
Q: Why choose a Long Barrel over a Standard Barrel for 250 KCM connections?
A: Long Barrel lugs allow for more crimps, which significantly increases the mechanical grip on the conductor. For heavy-gauge wires like 250 KCM, this ensures a lower resistance connection and much higher pull-out resistance, making it essential for mission-critical or high-vibration power systems.
Q: Is it safe to use a lug without an inspection window?
A: Yes, it is often preferred in specific environments. While an inspection window allows you to see the cable entry, a sealed barrel (no window) provides a complete barrier against oxygen, moisture, and chemicals. This “gas-tight” protection prevents the internal copper strands from oxidizing, which is critical in corrosive industrial settings.
Q: What crimping die is required for this XLUIG terminal?
A: All XLUIG 250 KCM terminals are color-coded Yellow, requiring a Die Index 62. Because this is a Long Barrel version, please ensure you perform the recommended number of crimps (usually 2 or more depending on the tool) starting from the lug’s tongue and moving toward the cable.
Product Attributes
| Property | Details |
| Industry | Industrial Fastener |
| Brand Name | XLUIG (Kunshan Xinluan New Material Technology Co., Ltd) |
| Place of Origin | Jiangsu, China |
| Certificate | ISO 9001:2015 Certified |
| Thread Size | Customized sizes available |
| MOQ | 5,00 Pieces |
| OEM / ODM | Support (Based on technical drawings) |
| Samples | Available upon request |
Supply Ability
| Service Items | Details & Specifications |
| Packaging | Small boxes, plastic bags, bulk cartons, and wooden pallets |
| Supply Ability | 50,000,000 Piece/Pieces per Month |
| Transportation | Land, Ocean, Air, and Express Delivery |
| Port of Loading | Shanghai, Ningbo, Tianjin |
| Payment Type | T/T |
| Incoterm | FOB, CIF, EXW, DDP |