Thomas Betts F2039 Insulated Wire Ferrule 12 Awg 500 Pack

Product Description

The THOMAS BETTS F2039 is a nylon-insulated wire ferrule designed to terminate stranded conductors in screw clamp terminal blocks. Constructed from tin plated copper, each ferrule measures 0.189 inches in diameter and 0.787 inches in length, with a sleeve length of 0.472 inches and a sleeve diameter of 0.114 inches. Rated for 12 AWG conductors, this ferrule is UL approved and sold in a standard pack of 500. Electricians and panel wiring technicians install these ferrules to create clean, reliable terminations in industrial control panels, distribution boards, and automation enclosures.

The F2039 is suited for residential, commercial, and industrial electrical applications wherever stranded wire must be terminated into screw clamp or cage clamp terminal blocks. It is the preferred alternative to twisting wire strands or tinning wire ends before insertion. The nylon insulation sleeve prevents conductor breakage caused by bending, wire stress, or vibration while guiding the wire smoothly into the terminal block clamp. These ferrules are commonly used in control panel assembly, machine wiring, and DIN rail terminal strip installations where consistent, code-compliant wire terminations are required.

Key Features

• Tin plated copper tube construction ensures low-resistance, mechanically secure crimped terminations on 12 AWG stranded wire
• Nylon insulation sleeve prevents conductor breakage due to bending, vibration, and wire stress
• Eliminates the need to twist or tin wire ends before inserting into screw clamp terminal blocks
• Sleeve length of 0.472 inches and sleeve diameter of 0.114 inches provide consistent insertion depth and fitment
• UL approved for use in listed electrical assemblies
• Sold in a 500-piece pack for production panel builds and service stock

Compatibility

Designed for use with screw clamp and cage clamp terminal blocks accepting 12 AWG stranded conductors. Compatible with standard ferrule crimping tools designed for insulated pin ferrules.

Installation Notes

Installation is performed by licensed electricians in accordance with NEC requirements for wiring methods and terminal connections. De-energize the circuit and follow lockout/tagout procedures before terminating conductors at any terminal block. Strip the wire to the appropriate length, slide the ferrule onto the stripped end, crimp with a calibrated ferrule crimping tool, and insert the crimped end into the terminal block clamp. Do not use un-crimped ferrules as a substitute for proper crimp termination.

Technical Specifications

• Type: Insulated Ferrule
• Conductor Size: 12 AWG
• Material: Tin Plated Copper
• Insulation Material: Nylon
• Color: Gray
• Overall Diameter: 0.189 inches
• Overall Length: 0.787 inches
• Sleeve Length: 0.472 inches
• Sleeve Diameter: 0.114 inches
• Standard Package Quantity: 500
• Approvals: UL
• Country of Origin: DE
• Package Weight: 0.63 pounds

Standard Information

• Brand: THOMAS BETTS
• Manufacturer Part Number: F2039