Wichard Self-Locking D Shackle - 12mm Diameter - 15/32"

The Wichard Self-Locking D Shackle – 12mm Diameter – 15/32" is a precision rigging component engineered for serious boaters and anglers who demand reliability in demanding marine environments. Whether you're securing anchor lines, connecting halyards, or fastening critical deck hardware, this self-locking shackle eliminates the constant worry of vibration-induced loosening that plagues standard shackles. Built for professional-grade applications, it's the choice of working boats and offshore vessels that can't afford equipment failure.

Manufactured from grade 316L stainless steel, this shackle features a unique self-locking design where the pin seats into precisely machined indentations that mechanically secure it against unwinding. Unlike traditional pin-and-castle-pin arrangements, this system requires no additional cotter pins, split rings, or safety wire—reducing assembly time while increasing reliability. The 12mm diameter provides substantial load capacity suitable for mid-range cruising vessels, charter boats, and commercial fishing operations, while the robust stainless construction resists saltwater corrosion far better than galvanized or mild steel alternatives.

This shackle excels in high-vibration applications where engine noise, wave action, and repetitive deck movement would normally compromise unsecured fasteners. Experienced boaters specify Wichard rigging hardware for systems where a loose shackle could mean lost anchors, failed halyards, or compromised safety equipment. Installation is straightforward—simply insert the pin into the appropriate indentation for your load angle, and the mechanical locking geometry does the rest. Ideal for anchor systems, boom preventers, sheet attachments, and any critical deck hardware requiring absolute vibration resistance.