Cable Ties vs. Hook-and-Loop Straps: Choosing the Right Cable Management for Data Centre Racks

Data centre rack cabling benefits from fastening methods that can be readjusted.

Three months after a data hall is handed over, an engineer returns to the same rack. This time the job is to add two switches and remove six old patch cables. Every nylon cable tie installed during the original build must now be cut off one by one, and the bundle must be re-tied afterwards. If the cutter slips, a fibre patch cord next to it may be damaged. AI server racks already carry far more cables than traditional racks, often several hundred per rack, and they are re-cabled frequently. In that environment, a fastener that locks only once gradually becomes a maintenance cost. This article explains the difference between cable ties and hook-and-loop straps, the matching KSS part numbers, and the situations each one is designed for.

1. Two Different Fastening Principles

A nylon cable tie is a locking fastener. The toothed strap engages with a pawl and locks in one direction only. Tension depends on how hard the installer pulls, and removal requires cutting. It is a single-use consumable. A hook-and-loop strap works differently. The hook face and the loop face join together, and the strap passes through a buckle and folds back on itself. It can be opened at any time, retensioned, and reused.

The KSS catalogue covers both. For bundling and grouping cables along rack rows, the CV series nylon cable ties apply (0301 series, UL recognised NYLON 66, flame rating 94V-2, length 63.7 to 1,500 mm, width 2.5 to 9.0 mm, tensile strength 7 to 462 lbs / 3 to 210 kgs, catalogue P.64-65). For network and signal cables inside the rack, the MGL and MTL hook-and-loop straps apply (0351 / 0352 series, catalogue P.93). This is not a question of which product is better. Each one solves a different fastening requirement.

2. Why Network and Fibre Cables Should Not Be Bundled Too Tightly

High-speed network cables (UTP and STP) and fibre patch cords are far more sensitive to external pressure than standard power cables. A nylon cable tie applies pressure over a narrow contact area. If the bundle is pulled too tight, the cable jacket and internal structure can be deformed, which affects transmission quality. On site, tension is usually judged by hand, so it is difficult to standardise.

The KSS catalogue describes the MGL and MTL series clearly: designed for bundling network cables, signal cables and power cables, and reusable. Repeated opening and adjustable tension match the two constants of a data centre. First, cables must not be compressed too tightly. Second, the cabling keeps changing.

ANSI/TIA-942-C has also raised the minimum rack width to 800 mm for the main, intermediate and horizontal distribution areas, while VSFF connectors push fibre density towards 400G and 1.6T (16 fibre) applications. The number of cables in a single rack is now far higher than in a traditional rack. The more cables there are, the denser they become, and the more often they change, the more valuable a reusable fastener becomes. (Trend data source: publicly available ANSI/TIA-942-C technical material.)

3. MGL vs. MTL: Plastic Buckle or Metal Buckle

KSS offers two hook-and-loop strap series. The main differences are the buckle material and the size range:

Nylon cable ties and hook-and-loop straps serve different fastening requirements.

 

The selection rule is simple. Choose MGL when a single strap must hold a wider or thicker bundle, since the strap width reaches 90 mm. Choose MTL when the bundle is narrower but the buckle needs to be stronger, or when the required length is either longer (up to 702 mm) or shorter (from 153 mm).

4. When a Cable Tie Is Still the Correct Choice

Hook-and-loop straps do not replace cable ties. In the following situations, cable ties, ducts or clamps remain the correct solution:

 

In one sentence: use cable ties where a permanent lock is needed and where a flame or weather rating must be documented; use hook-and-loop straps where the bundle is opened frequently and the cables must not be compressed. In practice both are used inside the same rack. This is not an either-or decision.