0.3-4mm 304 Stainless Steel Wire Rope Marine Grade Metal Cable 7 x 7 Clothesline

For a standard residential clothesline spanning up to 10 meters (33 ft), 1.0 mm to 1.5 mm diameter wire rope is the most common choice. It provides enough tensile strength for a full load of wet laundry while remaining easy to thread through standard clothesline fittings and tensioners. For longer spans or heavier loads, step up to 2.0 mm.

For decorative or light-duty cable railing infill (horizontal cables between posts), 304 SS in 2.0–3.0 mm diameter with 7×7 construction is commonly used in residential settings. For code-compliant structural railing that must meet specific load ratings, consult your local building code — some jurisdictions require 316 marine-grade SS or specific minimum breaking loads. Always verify with a licensed contractor for structural applications.

A 7×7 cable has 7 strands of 7 wires each (49 wires total), making it more flexible and easier to bend around pulleys, through fittings, and into tight curves. A 1×19 cable has 19 individual wires in a single strand, which is stiffer and better suited to straight, static runs like standing rigging. For clotheslines, trellises, and applications requiring some flex, 7×7 is the practical choice.

304 stainless steel contains 18% chromium and 8% nickel, which form a passive oxide layer that resists rust and oxidation in most outdoor environments. In moderate coastal or salt-air conditions it performs well for years. In heavily marine or chlorinated environments (e.g., directly on a saltwater dock or inside a pool enclosure), 316 stainless steel offers superior chloride resistance. For typical backyard and home use, 304 is the standard specification.

The most common termination method for DIY use is aluminum or stainless steel ferrule sleeves crimped with a hand swaging tool or bench crimper. Match the ferrule inner diameter to your cable diameter (e.g., a 1.0 mm cable uses a 1.0 mm ferrule). You can also use wire rope clips (U-bolt clamps) for adjustable connections. For a clean finished look on railings, swage stud or eye fittings are available at most hardware suppliers.

Measure your total run, then add at least 15–20 cm (6–8 in) per end for termination loops or ferrule crimps. If you have multiple runs (e.g., 5 horizontal cables on a railing panel), multiply accordingly. Ordering a single longer spool (e.g., 10 m or 20 m) and cutting to length on-site is more economical than ordering multiple short pieces, and the per-meter price decreases with longer lengths in this listing.

Yes. The 0.5 mm to 1.0 mm diameters are well suited for horizontal trellis wires, espalier fruit tree training, and vertical plant support systems. Stainless steel will not stain masonry or timber the way galvanized wire can, and it will not degrade from fertilizer or irrigation water contact. Tension with a simple wire strainer or turnbuckle for a taut, long-lasting installation.