Rigging Hardware
G80 High-Strength Connecting Link (Butterfly Link / European Chain Connecting Link) — 13-8 (WLL 5.3T)
Grade 80 forged alloy steel connecting link for 13 mm chain, rated WLL 5.3 tons (5300 kg). Two interlocking halves locked by a hardened center pin and internal snap ring—compact, vibration-proof and ideal for permanent chain sling assemblies.
Request a Quote1. Product Overview
This is a heavy-duty Grade 80 high-strength connecting link (commonly called a butterfly link, double-loop connecting link or European chain connecting link) in 13-8 size, rated for a working load limit (WLL) of 5.3 tons (5300 kg). Unlike screw-pin or bolt-type shackles that are frequently opened and closed, this link is a permanent high-strength fitting designed for Grade 80 chain sling assemblies. Two forged halves interlock and are secured by a hardened center pin and internal elastic snap ring. The full red industrial coating provides strong outdoor corrosion protection and high visibility on busy lifting sites.
2. Key Features & Design Highlights
- Grade 80 forged alloy steel: Precision drop-forged from high-strength alloy steel, quenched and tempered for high tensile strength, fatigue life and low-temperature toughness. Under overload the link tends to deform plastically rather than fail brittle without warning.
- 13-8 size, 5.3T WLL: Body markings include 13-8 for 13 mm Grade 80 chain, WLL 5.3T; CE marking can be arranged per order when required by your market. Breaking load typically reaches 4× WLL or higher.
- Center pin dead-lock system: Two symmetrical forged halves interlock; a blackened hardened center pin with an internal snap ring locks permanently once driven home—resistant to vibration, rotation and multi-directional movement.
- Full red high-visibility coating: High-saturation industrial red paint blocks moisture and mud while making the link easy to spot for remote safety checks on site.
- Compact smooth profile: The assembled oval shape is narrower and smoother than bow or D shackles—less likely to snag when dragged with chain, passing through lifting lugs or sliding on crane hooks.
3. Primary Applications
- Assembly and repair of Grade 80 chain slings—connecting 13 mm chain to master links, shortening hooks, eye hooks or container lifting fittings.
- Mining, tunneling and heavy industrial lifting where vibration and impact demand a positive lock that will not back out.
- Port, marine and deck securement as part of high-strength lashing chain systems under wave and wind motion.
- Heavy recovery and towing terminals on rescue and transport equipment where omnidirectional pull must stay locked.
4. Specifications
| Product Type | G80 high-strength connecting link (butterfly / European type) |
|---|---|
| Grade | G80 (Grade 80) lifting alloy steel |
| Nominal Size | 13-8 (for 13 mm Grade 80 chain) |
| Working Load Limit (WLL) | 5.3 T (5.3 TON / 5300 kg) |
| Material & Process | Alloy steel, drop-forged, quenched and tempered |
| Locking System | Interlocking halves + blackened center pin + internal snap ring |
| Finish | Full industrial red paint / blackened center pin |
| Markings | WLL 5.3T, 13-8 (CE marking available upon request) |
Safety Guidelines
- Not a quick-release fitting—assembly usually requires driving the center pin in with a hammer; disassembly needs a drift pin. For frequent connect/disconnect, use a screw-pin or bolt-type shackle (G-209 or G-210).
- Confirm the center pin is fully seated and the internal snap ring is engaged before loading—an incomplete pin can slide out under load with catastrophic results.
- Do not weld, heat or modify—the heat treatment must not be altered.
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