1mm to 20mm Wire Rope 304 A2 Stainless Steel Wire Metal Cable 7x19 Construction

For residential deck and stair balustrade infill, 1.5mm to 3.0mm wire rope in 7×19 construction is the most common specification. The 7×19 lay allows the cable to pass through swaged end fittings and tensioners without kinking. For spans over 1.8m (6 ft), 3.0mm or 4.0mm is recommended to limit mid-span deflection under lateral load. Always verify local building code requirements for balustrade cable spacing and tensile strength before finalising your diameter selection.

7×19 wire rope is made up of 7 strands, each containing 19 individual wires, giving a total of 133 wires per rope cross-section. This multi-strand construction makes the rope flexible and resistant to fatigue from repeated bending — ideal for runs through pulleys, around corners, or through swaged fittings. 1×19 construction uses a single strand of 19 wires, producing a stiffer, lower-stretch cable with a cleaner surface profile. It is preferred for straight architectural cable walls, standing rigging, and fixed-tension spans where flexibility is not required.

304 (A2) stainless steel offers good resistance to atmospheric corrosion and mild salt spray, making it suitable for coastal and freshwater marine applications such as boat rigging, dock fencing, and pontoon railings. For continuous immersion in seawater or highly aggressive salt environments — such as offshore or tidal-zone installations — 316 (A4) stainless steel is generally the preferred specification due to its higher molybdenum content. If your application involves prolonged saltwater contact, consider upgrading to 316 grade.

Yes. The 7×19 construction is fully compatible with standard swage fittings (open and closed body), Sta-Lok and Petersen-style mechanical terminals, and wire rope grips (bulldog clips). Always match the fitting bore diameter to the wire rope diameter you have selected — for example, a 3.0mm fitting for 3.0mm rope. The 1×19 construction is best used with compression-type end fittings or fixed-pin terminals rather than swage fittings, as its stiffer lay can be more difficult to seat correctly in a swage die.

Measure the total run length of each cable span, then add allowance for the end fittings — typically 50–80mm per end for swaged or mechanical terminals. For balustrade systems, calculate the number of individual cable runs and multiply by the span length plus fitting allowance. The pack options of 1, 2, 3, 5, and 10 metres allow you to order the closest match to your requirement. If your project needs a length not listed, order the next size up and trim to length using a cable cutter or angle grinder with a cutting disc.

For clean cuts without fraying, use a dedicated wire rope cutter (scissor or ratchet type) sized for your chosen diameter, or an angle grinder with a thin cutting disc. Avoid using standard bolt cutters on diameters above 4mm as they can distort the strand lay at the cut end. To prevent the cut end from unravelling before fitting, wrap the cut point with electrical tape or apply a small amount of heat-shrink tubing. For swaged terminations, a hydraulic swaging tool matched to your fitting size is required; mechanical Sta-Lok-style fittings can be assembled with basic hand tools.

Breaking load varies by diameter and construction. As a general guide for 7×19 304 stainless wire rope: 1.0mm is typically rated at approximately 0.6–0.8 kN, 2.0mm at approximately 2.0–2.5 kN, 3.0mm at approximately 4.5–5.5 kN, 4.0mm at approximately 8–10 kN, 6.0mm at approximately 18–22 kN, and 8.0mm at approximately 32–38 kN. These are indicative figures based on standard industry tables for 7×19 304 SS rope; actual values depend on manufacturing tolerances. Contact us to confirm rated breaking load for your specific diameter before use in safety-critical lifting or load-bearing applications.