Eaton Arrow Hart ultra grip plug 5666 - UL/NOM 6221
Part Number: 5666
Quick Summary
The Eaton Arrow Hart ultra grip straight blade plug delivers secure, high-quality power connections for industrial control panels. Engineers often battle loose terminations in tight wiring spaces; this design provides back-wire capability and a robust nylon body to withstand vibration and harsh environments. It carries UL recognition, NOM approval, and Federal Specification Classification 6221 02, along with a 6-15P NEMA configuration for 250V systems. With color-contrast brass contacts and compatible #18-12 AWG conductors, this plug supports fast, reliable installations that reduce commissioning time and maintenance costs. Designed for industrial wiring, it serves control panels, motor starters, and equipment enclosures while delivering dependable performance and long service life.
Product Information
Extended Description
5666 Eaton: Eaton Arrow Hart ultra grip straight blade plug, #18-12 AWG, 15A, Industrial, 250V, Back wire, Black and white, Brass, Nylon, 6-15P, Two-pole, three-wire, grounding, Screw, 0.33-0.66", Nylon, Core pack
Product Name
Eaton Arrow Hart ultra grip straight blade plug
Catalog Number
5666
UPC
032664394003
Product Length/Depth
1.25 in
Product Height
7.5 in
Product Width
3.5 in
Product Weight
0.15 lb
Certifications
UL NOM Federal Specification Classification 6221 02
Amperage Rating
15A
NEMA configuration
6-15P
Voltage rating
250V
Wiring method
Back wire
Color
White Black
Contact material
Brass
Face/body material
Nylon
Material
Nylon
Packaging type
Core pack
Allowable wire size
#18-12 AWG
Application
Industrial
Connection type
Screw
Cord range
0.33-0.66" in diameter
Design type
Straight blade
Device grade
Extra heavy-duty industrial specification grade
Device type
Plug
Number Of Poles
Two-pole
Number of wires
3
Receptacle type
Two-pole, three-wire, grounding
Style type
Straight body
Type
Plug
Wiring Devices Buyer’s Guide
Arrow Hart - Connecting Safety to Reliability since 1890
Eaton Specification Sheet - 5666
Feature: Ultra grip straight blade design with brass contacts provides a secure, vibration-resistant connection. Business Impact: Reduces the risk of terminations loosening under normal vibrations found in panels and enclosures, leading to fewer field service calls. Application: Ideal for industrial wiring in control cabinets and equipment housings, where reliability matters. Feature: Nylon body with color code options (White/Black) offers heat and chemical resistance. Business Impact: Extends component life in harsh environments and simplifies identification during wiring and maintenance. Application: Suitable for factory floors, machine rooms, and outdoor installations where exposure to dust, oils, and temperature swings occurs. Feature: Back-wire termination with optional screw termination provides installation flexibility. Business Impact: Speeds up field assembly and allows quick rework without sacrificing secure connections. Application: Common in panel builds and retrofit projects where wiring density is high and technician time is critical. Feature: Compatibility with #18-12 AWG conductors and wire diameter 0.33–0.66 in expands wiring flexibility. Business Impact: Maximizes standard wire stock usage, reduces stocking variety, and lowers project lead times. Application: Wiring devices in motor control centers, switchgear, and process equipment where solid conductor terminations are required. Feature: Electrical ratings of 15A at 250V with 6-15P/NEMA configuration meet industrial standards. Business Impact: Ensures regulatory compliance and safe operation in medium-power circuits, minimizing over-spec and over-engineering. Application: Suitable for power feeds, control circuits, and machine interfaces in manufacturing lines. Feature: Certifications UL NOM 6221 02 and core-pack packaging support compliance and waste reduction. Business Impact: Simplifies procurement and reduces disposal impact, aiding sustainability goals. Application: Compliance-focused projects in regulated facilities and OEM assemblies.
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FAQs
The 5666 supports back-wire Termination for fast, screw-free wire insertion into a clamp-style back-wire connector; however, screw termination is also available per the product specifications. Prepare #18-12 AWG conductors; trim to the appropriate length; insert into the back-wire clamp and tighten. This flexibility reduces labor time and allows quick field reconfiguration in control panels.
The 5666 is rated for 15A at 250V with a NEMA 6-15P configuration. It supports #18-12 AWG wires and a cord diameter range of 0.33–0.66 inches. This combination makes it suitable for typical mid-power industrial circuits and motor-related control wiring in panels and enclosures.
Yes. The plug uses a rugged nylon body and brass contacts with an ultra grip blade design to resist loosening in vibration. This makes it well-suited for industrial cabinets, conveyor lines, and equipment subject to mechanical chatter, reducing field failures and maintenance downtime.
The 5666 carries UL recognition, NOM certification, and Federal Specification Classification 6221 02. These certifications confirm compliance with safety, reliability, and government procurement standards, which reduces risk for OEMs and ensures consistent performance in regulated environments.
The 5666 offers faster installation via back-wire termination, compatible conduit and conductor ranges, and durable nylon/brass construction, all contributing to reduced commissioning time and longer service life. Its core-pack packaging also minimizes waste, supporting lean assembly processes and lower lifecycle costs in manufacturing environments.