Heavy Duty Stainless Steel D Shackle Bolt Type with Nut & Cotter Pin Polished for Towing Webnet

Heavy Duty Stainless Steel D Shackle Bolt Type with Nut & Cotter Pin Polished – For Heavy Industry, Mining Lifting, Towing & Webnet

1. Product Description

The Heavy Duty Stainless Steel D Shackle Bolt Type with Nut & Cotter Pin Polished is a high‑strength, corrosion‑resistant lifting and rigging component designed for heavy industry, mining, construction hoisting, towing, and webnet (safety net) tensioning. Manufactured from premium stainless steel (304 or 316) via forging or precision casting, this D‑shaped shackle features a bolt type pin secured with a nut and a cotter pin for double‑locking safety, preventing accidental loosening under severe vibration and dynamic loads.

The shackle is 100% load tested and available in imperial sizes from 3/16″ to 1″ (metric equivalents from 6.35 mm to 28.57 mm), with breaking loads ranging from 1,250 kg to 23,000 kg (2,760 lbs to 50,700 lbs). The polished surface finish provides a smooth, rust‑resistant, professional appearance. Fully customizable in size, length, width, packaging, logo, and surface finish. Free samples and small orders are supported, with door‑to‑door service available.

Ideal for heavy lifting in mining, industrial rigging, towing operations, and webnet systems (rockfall barriers, animal enclosures, facade safety nets), this stainless steel D shackle combines excellent corrosion resistance, safety, and long‑term durability.

2.Product Attributes

Additional Specifications:

• Material: Stainless steel 304 or 316 (forged). Custom materials on request.

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

• Pin type: Bolt type with nut and 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). Example: 3/8″ shackle (4,900 kg BL) → WLL approx. 980–1,225 kg.

• Design standard: Oversize chain shackle, meets international lifting standards (EN 13889, ASME B30.26).

• Customization: Size, length, width, packaging, logo, surface finish, material (min order 1,000 pieces for certain options).

3. Key Features

• Stainless steel construction (304/316) – Excellent corrosion resistance for marine, mining, and industrial environments. Polished finish provides a bright, professional appearance.

• Bolt type pin with nut and cotter pin – Double locking mechanism prevents accidental loosening under vibration, shock loads, and dynamic lifting.

• D‑shape design – Compact geometry ideal for in‑line pulling, reducing side loading. Distributes load evenly.

• 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.

• 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 & small orders – Low MOQ for trials; flexible ordering.

• Wide applications – Heavy industry, mining lifting, towing, webnet tensioning, construction, and equipment fixing.

4. Applications

The Heavy Duty Stainless Steel D Shackle is used in numerous demanding fields:

• Heavy industry – Overhead crane lifting, steel mill slings, heavy equipment maintenance, industrial hoisting.

• Mining lifting – Conveyor belt splicing, bucket rigging, dragline attachments, safety line anchors, ore car couplings.

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

• 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 fall arrest systems.

• Construction & hoisting – Steel beam lifting, concrete panel rigging, scaffolding ties, crane sling attachments.

• Marine & offshore – Mooring lines, anchor chains, towing bridles (304/316 stainless resists saltwater corrosion).

• General engineering – Machinery fixing, agricultural equipment, stage rigging.

5. Technical Principles

5.1 Material & Strength

304 stainless steel provides good tensile strength (approx. 515 MPa yield) and excellent corrosion resistance in most environments. Grade 316 offers enhanced protection against chlorides (saltwater). The D‑shape geometry minimizes stress concentration at the pin holes and distributes the load along the straight body, making it ideal for in‑line pulling.

5.2 Safety Factor

Shackles are designed with a safety factor of 4:1 or 5:1 (breaking load / working load limit). For example, a shackle with a breaking load of 9,900 kg (1/2″) has a WLL of approximately 1,980–2,475 kg. Users must never exceed the WLL and must account for dynamic loads, angle of pull, and wear.

5.3 Nut and Cotter Pin Locking

The bolt type pin is inserted through the shackle ears and the attached component, then secured with a nut. A cotter pin is inserted through a hole in the bolt end and bent to lock the nut in place. This double locking prevents the pin from loosening or backing out under severe vibration, making it ideal for heavy‑duty and dynamic applications.

5.4 Corrosion Resistance

Stainless steel (304/316) forms a passive chromium oxide layer that protects against rust. The polished surface reduces crevices and makes cleaning easier. For saltwater or high‑chloride environments, grade 316 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 and compliance with international standards.

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