Master Links & Rings

Every wire rope, chain, or synthetic bridle sling starts with a Master Link. As the upper terminal fitting, the master link must be large enough to fit over the crane hook's saddle and strong enough to support the aggregate weight of the entire load.

Holloway Houston Inc. (HHI) offers an unparalleled selection of forged rings. Whether you need a compact 1/2" link for a tool box sling or a massive 4-1/2" offshore ring with a 300-ton capacity, we supply the certified hardware required for construction, oil & gas, and heavy manufacturing.

The Product Ecosystem

1. Standard Alloy Master Links (1 & 2 Leg Lifts)

Designed for general overhead lifting, these single rings are used for single-leg slings or 2-leg bridles.

• Crosby (A-342): The industry standard. Forged from alloy steel and Quenched & Tempered for ductility.
• Yoke & Carcano: High-performance Grade 100 links that offer high strength in a lighter profile.
• Gunnebo (M / MF Series): Renowned Swedish quality, featuring a flattened section on the ring to facilitate the connection of couplers (like the Gunnebo Berglok).

2. Master Link Assemblies (3 & 4 Leg Lifts)

Also known as "Quad Assemblies" or "Sub-Assemblies."

• The Design: A Master Link Assembly consists of one large main ring with two smaller intermediate links attached.
• The Purpose: This configuration is mandatory for 3-leg and 4-leg bridles. It ensures proper load distribution and prevents "crowding" at the crane hook, which can cause dangerous stress concentrations.
• Inventory: We stock assemblies from Crosby (A-345/A-347) and William Hackett (HA Quad).

3. Offshore & DNV Master Links

Built for the extreme conditions of the North Sea and Gulf of Mexico.

• William Hackett (HA OS+): Features a dual-layer zinc/powder coat finish (Orange) for superior corrosion resistance. Fully compliant with DNV 2.7-1 for offshore containers.
• Gunnebo Arctic: Designed to maintain impact strength in sub-zero temperatures (down to -40°C), essential for subsea and polar operations.

4. Stainless Steel Master Links

• Cromox (CAG Series): Manufactured from Grade 60 Stainless Steel. These are vital for lifting in clean rooms, wastewater facilities, or food processing plants where carbon steel would rust or contaminate the environment.

Selection Guide: Sizing Your Link

1. Capacity (WLL)

The Master Link must have a Working Load Limit (WLL) equal to or greater than the total load being lifted. Note: When building a multi-leg sling, the master link must account for the angular loading of the legs.

2. Crane Hook Compatibility

A common mistake is buying a link that is strong enough but physically too small to fit over the crane hook.

• Throat Opening: Ensure the inner dimensions (width and length) of the master link are large enough to sit freely in the bowl of the crane hook without binding on the safety latch.
• Engineered/Oversized Links: For large crane hooks, look for "Wide Body" or "Pear Shaped" links found in our Crosby and Gunnebo inventory.

3. Grade Compatibility

• Chain Slings: A Grade 100 chain sling requires a Grade 100 Master Link. Never downgrade the assembly by using a lower-grade ring.
• Wire Rope/Synthetic: Most alloy master links (like Crosby A-342) are suitable for use with wire rope and synthetic slings.

Technical Specifications

• Material: Alloy Steel (Standard), Stainless Steel (Cromox).
• Safety Factor: Typically 5:1 (Wire Rope/Synthetic) or 4:1 (Chain).
• Standards: Meets or exceeds ASME B30.26. Offshore models meet DNV 2.7-1.
• Proof Test: All master links are individually proof-tested at the factory (usually 2x or 2.5x WLL).

Browse our inventory below to filter by Type (Single/Assembly), Manufacturer, and Working Load Limit.