Description

Gloma Nautica Bow Shackles “UNDER-EYE” – Captive Screw Pin, AISI 316

Gloma Nautica’s Bow Shackles with “under-eye” captive screw pin exemplify marine-grade rigging excellence. Forged from high-strength AISI 316 stainless steel, they provide unrivaled corrosion resistance, especially suited for harsh saltwater environments and heavy-duty applications where reliability is vital glomanautica.com+11nautos-usa.com+11detail.co.jp+11.

Why choose these bow shackles?

• Robust 316 Stainless Construction
  Crafted from marine-grade AISI 316, these shackles resist rust, pitting, and salt corrosion far better than standard stainless steel, promising long-lasting performance .

• Reinforced “Bow” Geometry
  The rounded “bow” shape offers a wider, more flexible load distribution than straight shackles, improving safety and reducing stress concentrations when connecting multiple lines, blocks, or straps.

• Captive Screw Pin with Eye
  A premium captive screw pin with integrated eye ensures the pin stays securely attached and easy to tighten—preventing accidental opening while allowing quick manual installation and inspection. Ideal for dynamic marine environments

• Wide Size Range & Load Ratings
  Available in metric sizes from 4 mm (~5/32″) to 12 mm (~1/2″), each size provides specific Working Load Limits (WLL) aligned with industry standards:

  • 4 mm (5/32″) up to 5 mm (3/16″) – lightweight applications

  • 6 mm (1/4″) – WLL ~2,300 kg

  • 8 mm (5/16″) – WLL ~2,300 kg

  • 10 mm (3/8″) – WLL ~3,800 kg

  • 12 mm (1/2″) – WLL ~5,500 kg glomanautica.com+10nautos-usa.com+10nautos-usa.com+10

  These shackles are versatile enough for everything from dinghy rigging to heavy lifting tasks.

• Forged for Maximum Strength
  Unlike cast alternatives, Gloma Nautica's sleek, forged production method ensures superior grain structure, mechanical performance, and predictable deformation characteristics under load.

• Safe & Maintenance-Friendly Finish
  A polished, electrochemically treated finish resists corrosion and makes visual inspection easy, helping identify wear before it becomes a problem

Applications & Use Cases
Ideal for sailboat halyards, mooring lines, lifting assemblies, towing, safety harnesses, davit systems, lifelines, or any scenario where secure, reliable, and easy-to-use hardware is required.

Gloma Nautica Advantage

• Marine-grade AISI 316: Built to last in oceanic environments

• Secure captive pin: No loose parts, easy one-handed operation

• Certified for high loads: Clear Working Load Limits for all sizes

• Forged, not cast: Optimal strength and fatigue resistance

• Made in Spain: Heritage manufacturing since 1975