Ronstan Swivel Shackle - 5/16" Pin - 2-3/8"L x 21/32"W

The Ronstan Swivel Shackle with 5/16" pin is a marine-grade hardware component engineered for sailors, boaters, and riggers who demand reliability in demanding conditions. Whether you're rigging a dinghy, securing halyards, or connecting deck hardware, this compact shackle delivers the swivel action necessary to prevent line twist and reduce stress on fittings during dynamic load shifts. Built for both racing crews and cruising vessels, the swivel design accommodates the constant movement inherent in working sailboats and powerboats.

Constructed from corrosion-resistant materials typical of Ronstan's proven marine engineering, the Ronstan Swivel Shackle features a robust 5/16" pin with a body measuring 2-3/8" long and 21/32" wide—dimensions that balance strength with a minimal footprint ideal for tight rigging scenarios. The swivel head rotates freely, allowing 360-degree movement that effectively reduces fatigue failure caused by twisting loads on line attachments. At just 0.2 lbs, the shackle won't add unnecessary weight to your vessel while maintaining the structural integrity required for saltwater and freshwater use alike.

Experienced riggers and maintenance-conscious boaters benefit most from this shackle's versatile pin size and compact dimensions, which integrate seamlessly into existing hardware systems on cruising yachts, racing dinghies, and commercial fishing vessels. The 5/16" pin accommodates standard marine fittings and blocks commonly found aboard modern sailboats, making replacement and upgrade work straightforward. Install this swivel shackle wherever lines experience rotational stress—head foil attachment points, jib sheet blocks, or anchor rode connections—to extend the lifespan of your rigging and reduce downtime.