Description
Gloma Nautica Bow HR Shackles – 17‑4 PH Stainless Steel, Electropolished
Built for the toughest conditions, Gloma Nautica’s Bow HR Shackles exemplify high-performance hardware ideal for professional rigging, lifting, and maritime applications. Manufactured in Cabrera de Mar, Spain, these shackles are forged from 17‑4 PH stainless steel, a martensitic, precipitation-hardened alloy delivering exceptional tensile strength, fatigue resistance, and up to 60% greater break load compared to standard AISI 316 shackles
Top-Tier Forging & Finish
The forging process ensures molecular alignment through the shackle body, maximizing load resistance and fatigue strength. This robust construction is complemented by an electropolished finish, which smooths microscopic imperfections, enhances corrosion protection, and facilitates rapid inspection during service .
Optimized Bow Geometry
With its iconic rounded bow shape, these shackles distribute loads efficiently and accommodate multiple attachments—ideal for complex rigging, block systems, and towing setups. The geometry also ensures safer swivel action under load, reducing wear on lines and hardware.
Certified Load Ratings
Available in three metric sizes, each shackle is tested and certified with Working Load Limits (WLL) and break loads:
| Ref | Ø (mm) | A (mm) | B (mm) | C (mm) | WLL (kg) | Break Load (kg) | Qty/Bag | Bag Weight (kg) |
|---|---|---|---|---|---|---|---|---|
| 304‑HR | 8 | 16 | 36 | 25 | 2,300 | 4,700 | 25 | 1.675 |
| 305‑HR | 10 | 20 | 46 | 31 | 3,800 | 7,500 | 10 | 1.350 |
| 306‑HR | 12 | 24 | 55 | 38 | 5,500 | 10,900 | 10 | 2.260 |
These ratings offer clear, traceable performance metrics for professional users.
Superior Corrosion Protection
The combination of 17‑4 PH alloy and electropolishing ensures exceptional resistance to saltwater, industrial chemicals, and marine biofouling—making these shackles ideal for offshore, deck, and coastal operations.
User-Friendly Design
With a screw pin and large eye, installation and removal are tool-free yet secure under tension. The non-removable pin (in captive models) prevents misplacement and enhances safety during frequent adjustment or load changes.
Applications & Use Cases
These shackles are suited for anchor bridging, towing bridle points, crane rigging, deck hardware, industrial lifting slings, and anywhere maximum strength and corrosion resistance are essential. The bow design also supports multi-line or multi-block attachments without compromising safety.
Gloma Nautica Quality Assurance
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Made in Spain: forged and verified in-house since 1975 nautos-usa.com+4hodgesmarine.com+4theriggingpoint.com+4marine.wichard.com+14glomanautica.com+14amazon.com+14marine.wichard.com+4nautos-usa.com+4nautos-usa.com+4marine.wichard.com+1hodgesmarine.com+1
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Certified performance: undergoes APPLUS testing
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High-resistance alloy: 17‑4 PH exceeds AISI 316 strength
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Electropolished finish: ideal for inspection and longevity
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Trusted durability: marked "HR" for quick identification
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