Cable accessory Rittal 4051.724 polypropylene ferrules 2.5 mm², length 10 mm, diameter 4.2 mm, pack of 500

Rittal 4051.724 polypropylene ferrules for 2.5 mm² conductors are wire end sleeves designed to provide secure, consistent terminations in control panels, distribution blocks and other electrical installations. Manufactured from polypropylene in grey colour, each ferrule measures 10 mm in length with an outer diameter of 4.2 mm and is supplied in a pack of 500. These ferrules help prevent strand fraying, improve contact reliability and make conductor insertion into screw or clamp-type terminals easier and more repeatable.

Advantages

Polypropylene construction offers a balance of insulation, dimensional stability and resistance to mechanical handling during assembly. The 10 mm length and 4.2 mm outer diameter suit common 2.5 mm² stranded conductors, providing full strand containment and consistent compression under terminal screws. Supplied in a large pack, they reduce changeover frequency on production lines and in maintenance kits while ensuring uniform terminations across multiple connections.

Suitable for

• Terminating stranded 2.5 mm² conductors into screw, clamp or spring terminals
• Control panels, terminal blocks and distribution boards
• Electrical maintenance kits and production assembly stations
• Situations where preventing strand fraying and improving repeated insertions is required

When it may not be suitable

These polypropylene ferrules are intended for use with stranded conductors of nominal 2.5 mm² cross-section; they are not suitable for solid conductors or conductors of significantly different cross-sectional area. They do not provide additional electrical insulation beyond the basic polymer sleeve and are not intended as a primary protective barrier in high-voltage or high-temperature environments.

Key specifications

• Material: polypropylene (PP)
• Rated conductor cross-section: 2.5 mm² (stranded)
• Length: 10 mm
• Outer diameter: 4.2 mm
• Colour: grey
• Pack quantity: 500 pieces

How to use

Strip the conductor to the appropriate length so exposed strands match the ferrule insertion depth. Insert the stranded conductor fully into the ferrule barrel, then crimp using a suitable insulated ferrule crimping tool sized for 2.5 mm² ferrules to ensure correct compression and a gas-tight connection. After crimping, insert the ferrule-terminated conductor into the terminal and secure according to the terminal manufacturer's instructions.

What to consider before purchase

• Confirm conductor type and cross-section: designed for stranded 2.5 mm² conductors
• Ensure crimping tool compatibility with 2.5 mm² polypropylene ferrules
• Verify that the ferrule length and outer diameter suit your terminal geometry
• Assess if polypropylene material properties meet environmental and temperature requirements for your installation

Usage recommendations

Use with a matched crimping die for 2.5 mm² ferrules and follow standard crimp quality checks: visual inspection, pull tests where appropriate, and correct terminal tightening. Store unopened packs in a dry environment away from direct sunlight to maintain material properties.