304 Stainless Steel Bow Shackle Safety Bolt Pin for Marine & Construction

Product Specification

304 Stainless Steel Bow Shackle with Safety Bolt Pin – For Marine & Construction Lifting & Webnet

1. Product Description

The 304 Stainless Steel Bow Shackle with Safety Bolt Pin is a high‑strength, corrosion‑resistant lifting and rigging component designed for marine environments, construction hoisting, and webnet (stainless steel safety net) tensioning. Manufactured from premium AISI 304 stainless steel via drop forging, this bow shackle features a polished surface and a safety bolt pin (threaded pin with nut and cotter pin) for secure locking, preventing accidental loosening under vibration or dynamic loads.

The bow (anchor) shape provides a wider radius than D‑shackles, allowing it to accept multiple sling legs, larger shackles, or rope eyes without pinching. The shackle is 100% load tested and available in imperial sizes from 3/16″ to 1″ (metric equivalents from 6.25 mm to 28.57 mm), with breaking loads ranging from 1,250 kg to 23,000 kg (2,760 lbs to 50,700 lbs). It is fully customizable in size, length, width, packaging, logo, and surface finish. Free samples are supported.

Ideal for marine rigging, construction lifting, webnet systems, towing, and equipment fixing, this stainless steel bow shackle combines excellent corrosion resistance, safety, and long‑term reliability.

2.Product Attributes

Additional Specifications:

• Material: 304 stainless steel (forged). Other grades (316) available on request.

• Surface finish: Polished (bright). Other finishes (passivated, electro‑polished) available.

• Pin type: Safety bolt pin (threaded pin + nut + cotter pin). Also available with screw collar pin.

• Working load limit (WLL): Typically 1/4 to 1/5 of breaking load (safety factor 4:1 or 5:1). For example, a 3/8″ shackle with breaking load 4,900 kg has a WLL of approx. 980–1,225 kg.

• Design standard: Oversize chain shackle, meets European or international standards.

3. Key Features

• 304 stainless steel construction – Excellent corrosion resistance for marine, coastal, and outdoor environments. Polished finish provides a bright, professional appearance.

• Drop forged, bow shape – High strength, impact resistance, and a wider radius that accepts multiple sling legs or larger shackles without pinching. Reduces stress concentration.

• Safety bolt pin – Threaded pin with nut and cotter pin prevents accidental loosening under vibration, wave action, or dynamic lifting. Provides double safety.

• High breaking load – Sizes from 3/16″ to 1″ with breaking loads from 1,250 kg to 23,000 kg, suitable for light to heavy lifting, mooring, and webnet tensioning.

• 100% load tested – Each shackle is proof‑tested to its rated breaking load, ensuring safety and reliability.

• Fully customizable – Size, length, width, packaging, logo, and surface finish can be tailored.

• Free samples – Available for quality verification before bulk order.

• Wide applications – Marine rigging, construction hoisting, webnet systems, towing, equipment fixing, and architectural net tensioning.

4. Applications

The 304 Stainless Steel Bow Shackle with Safety Bolt Pin is used in numerous demanding fields:

• Marine rigging – Mooring lines, anchor chain connections, tow bridles, dock fender attachments, yacht rigging, offshore platform lifting.

• Construction lifting – Crane slings, steel beam hoisting, concrete panel rigging, scaffolding ties, fall protection anchor points.

• Webnet (safety net) systems – Tensioning and connecting stainless steel wire rope nets (webnets) for rockfall barriers, animal enclosures (zoos, aviaries), building facade safety nets, sports barriers, and architectural mesh (facade cladding, balustrades).

• Towing & vehicle recovery – Tow straps, winch lines, recovery rings, truck lashing.

• Equipment fixing – Securing heavy machinery, industrial equipment, and stage rigging.

• General industrial – Hoisting, binding, and load securing in food processing, mining, and general engineering.

5. Technical Principles

5.1 Material & Forging

AISI 304 stainless steel provides good tensile strength (approx. 515 MPa yield) and excellent resistance to oxidation and corrosion in most atmospheric and marine environments. Drop forging aligns the grain structure, eliminating porosity and increasing fatigue resistance. The bow geometry distributes tensile forces uniformly along the curved body, minimizing stress risers at the pin holes.

5.2 Safety Factor

Shackles are designed with a typical safety factor of 4:1 or 5:1 between breaking load and working load limit (WLL). Users must never exceed the WLL and should consider dynamic loads, angle of pull, and wear.

5.3 Safety Bolt Pin Mechanism

The safety bolt pin consists of a threaded pin, a nut, and a cotter pin. After inserting the pin, the nut is tightened and the cotter pin is inserted through a hole in the pin end and bent to lock. This prevents the nut from backing off under vibration, making it ideal for marine and dynamic lifting applications where standard screw pins might loosen.

5.4 Corrosion Resistance

304 stainless steel forms a passive chromium oxide layer that protects against rust. In saltwater or high‑chloride environments, regular rinsing or upgrading to 316 stainless steel is recommended for extended service life.

5.5 Load Testing & Traceability

Each shackle is proof‑loaded to 100% of its rated breaking load. Permanent markings (size, grade, and sometimes load rating) are stamped on the body for traceability.

Company Profile- anping county huihao wire mesh manufacture co.,ltd Huihao mainly produce: metal rings mesh, insulation fasteners, decoration metal mesh.

Huihao services include : pattern design frame design installation system design surface finished Mould customization