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# Main ST Collective NEMA L16-20R Grounding Locking Connector
## 20 Amp • 480 Volt AC • Heavy-Duty Industrial Twist Lock Connector
### Available in 1PK, 2PK, 4PK, 6PK, 8PK, 10PK, 12PK, 15PK & 20PK
Keep your equipment powered with confidence using the **Main ST Collective NEMA L16-20R Grounding Locking Connector**. Engineered for demanding commercial and industrial applications, these heavy-duty twist-lock connectors provide a secure, dependable electrical connection that helps prevent accidental disconnects while delivering consistent power in high-voltage environments.
Whether you're repairing industrial extension cords, building custom power cables, servicing generators, wiring manufacturing equipment, outfitting race trailers, or maintaining commercial electrical systems, these industrial-grade locking connectors are designed for long-lasting performance. The rugged thermoplastic housing, heavy-duty brass terminals, and twist-lock mechanism provide dependable operation even in harsh working conditions.
Available in multiple pack sizes, these locking connectors are ideal for electricians, contractors, maintenance departments, fabrication shops, fleet service, industrial facilities, and professionals who regularly build or repair heavy-duty power cords.
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# About Main ST Collective
Main ST Collective is the in-house hardware and electrical parts brand of **Main Street Eshop**, created for automotive enthusiasts, RV owners, racers, fabricators, contractors, commercial facilities, industrial users, and professional technicians.
Our mission is simple—to provide dependable, commercial-quality products that perform in real-world applications. From electrical connectors and replacement devices to automotive hardware and workshop essentials, Main ST Collective products are selected for durability, reliability, and value.
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# About Main Street Eshop
Main Street Eshop supplies premium automotive, electrical, industrial, RV, racing, trailer, and shop equipment for professionals and DIY customers alike.
Whether you're wiring a commercial facility, maintaining industrial equipment, powering specialty machinery, outfitting a race trailer, servicing generators, or upgrading your workshop, Main Street Eshop offers dependable products designed to keep your equipment operating safely and reliably.
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# Product Features
✔ NEMA L16-20R Grounding Twist-Lock Connector
✔ 20 Amp • 480 Volt AC Rating
✔ 3 Pole • 4 Wire Configuration
✔ Industrial Heavy-Duty Construction
✔ Twist-Lock Design Helps Prevent Accidental Disconnects
✔ Rugged Thermoplastic Housing
✔ Heavy-Duty Brass Internal Components
✔ Secure Screw Terminal Wire Connections
✔ Easy Wire Assembly
✔ Resistant to Impact, Heat, and Chemical Exposure
✔ Designed for Long Service Life
✔ cUL Listed
✔ NEMA Rated
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# Specifications
Product Type: Grounding Locking Connector
Configuration: NEMA L16-20R
Current Rating: 20 Amps
Voltage Rating: 480 VAC
Poles: 3
Wires: 4
Grounding: Yes
Connection Type: Twist Lock
Housing Material: Heavy-Duty Thermoplastic
Terminal Material: Brass
Color: Black
Certification: cUL Listed
Commercial / Industrial Grade Construction
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# Why Choose Main ST Collective Electrical Products?
Main ST Collective electrical products are engineered to provide dependable performance wherever secure, reliable power is required.
Ideal for:
✔ Industrial Equipment
✔ Commercial Facilities
✔ Manufacturing Machinery
✔ Fabrication Shops
✔ Workshops & Garages
✔ Race Trailers
✔ Industrial Generators
✔ Processing Equipment
✔ Construction Sites
✔ Agricultural Equipment
✔ Maintenance Departments
✔ Mobile Service Vehicles
✔ Electrical Contractors
The twist-lock design helps maintain a secure electrical connection in environments where vibration or movement could disconnect a standard connector.
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# Installation Features
• Twist-lock connection provides a secure, vibration-resistant electrical connection
• Easy-to-wire screw terminal assembly
• Heavy-duty brass contacts maximize conductivity
• Rugged thermoplastic housing resists impacts, heat, and chemicals
• Commercial-grade construction designed for demanding industrial environments
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# Available Pack Sizes
Choose the quantity that best fits your project:
• 1 Pack
• 2 Pack
• 4 Pack
• 6 Pack
• 8 Pack
• 10 Pack
• 12 Pack
• 15 Pack
• 20 Pack
Perfect for individual repairs, contractors, electricians, maintenance departments, fabrication shops, industrial facilities, and commercial inventory.
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# Common Applications
✔ Industrial Power Distribution
✔ Manufacturing Equipment
✔ Commercial Machinery
✔ Generator Connections
✔ Fabrication Equipment
✔ Race Trailer Electrical Systems
✔ Industrial Workshops
✔ Maintenance Operations
✔ Construction Equipment
✔ Agricultural Facilities
✔ Custom Industrial Power Cords
✔ Specialty Electrical Installations
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# Package Contents
Quantity selected from the listing variant:
• Main ST Collective NEMA L16-20R Grounding Locking Connector(s)
Available Pack Sizes:
1PK • 2PK • 4PK • 6PK • 8PK • 10PK • 12PK • 15PK • 20PK
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# Buyer Notes
✔ Verify your electrical application and NEMA configuration before ordering.
✔ Intended for 20A, 480V AC NEMA L16-20R applications.
✔ Always disconnect power before wiring electrical devices.
✔ Installation should comply with all applicable local electrical codes.
✔ Professional installation is recommended for commercial and industrial electrical equipment.
✔ Genuine Main ST Collective product supplied by Main Street Eshop.
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
