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Master link assembly
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Grade 80 US Type Forged Alloy Steel Master Link Assemblies (commonly classified under the A345 Design Standard) are premium rigging components engineered specifically for multi-leg sling applications. This heavy-duty sub-assembly consists of one master oblong link and two engineered sub-links, allowing for the perfect distribution of loads in 3-leg and 4-leg chain slings or wire rope slings. It ensures that individual sling legs remain separated at the main lifting point, eliminating the risk of crowding or dangerous bunching on large crane hooks.
Part NO. | Size (in) | Weight (kg) | W.L.L.(T) | Measure(mm) | |||||
A | B | D | 1 A | 1 B | 1 D | ||||
TKDSJ-2042-001 | 3/4 | 1.7 | 5.6 | 140 | 70 | 20 | 85 | 40 | 14 |
TKDSJ-2042-002 | 7/8 | 2.18 | 6.9 | 160 | 95 | 22 | 85 | 40 | 14 |
TKDSJ-2042-003 | 1 | 3.29 | 11.8 | 178 | 89 | 25 | 100 | 60 | 18 |
TKDSJ-2042-004 | 1-1/4 | 7.18 | 17.7 | 220 | 110 | 32 | 100 | 60 | 22 |
TKDSJ-2042-005 | 1-1/2 | 12.91 | 27.7 | 267 | 1358 | 38 | 180 | 100 | 30 |
TKDSJ-2042-006 | 1-3/4 | 21.25 | 38.5 | 305 | 152 | 45 | 180 | 100 | 32 |
TKDSJ-2042-007 | 2 | 30.34 | 46.5 | 356 | 178 | 50 | 180 | 100 | 38 |
TKDSJ-2042-008 | 2-1/2 | 64.4 | 72.6 | 406 | 203 | 64 | 355 | 178 | 51 |
TKDSJ-2042-009 | 2-3/4 | 89 | 98.4 | 406 | 241 | 70 | 406 | 203 | 57 |
Professionally die-forged from premium structural alloy steel, then quenched and tempered to enhance structural fatigue properties and impact strength.
Fully designed to meet the strict A345 dimensional standards. Meets or exceeds all requirements of ASME B30.9 and ASME B30.26 for safe overhead lifting compliance.
Features an industry-standard 4:1 safety factor (Minimum Breaking Strength is 4 times the Working Load Limit), providing a critical safety cushion during critical lifting operations.
Coated with a specialized, heavy-duty thermosetting powder plastified finish (typically high-visibility Gloss Red or Safety Yellow) to guard against severe corrosion, oxidation, and coastal weather elements.
Every single batch of master link assemblies undergoes 2.5 times the Working Load Limit (WLL) proof testing. Material heat codes and traceable batch numbers are permanently stamped onto each link body for full tracking.
Utilizing automated die-forging machinery and rigorous Non-Destructive Testing (NDT)—including Magnetic Particle Inspection (MPI)—to ensure zero internal fractures or micro-cracks.
We support customized laser engraving, customized raised lettering (brand logo/size markings), and special metric dimension alterations according to custom engineering blueprints.
Our large-volume production capabilities allow us to minimize material costs and provide premium direct wholesale pricing to global rigging hardware distributors and shipping companies.
A: Using a single master link for 3-leg or 4-leg slings can force the upper chain fittings to overlap and crowd, causing severe structural stress and uneven weight distribution. A master link assembly provides two sub-links that separate the legs cleanly (two legs per sub-link), balancing the tension forces and ensuring absolute lifting alignment.
A: Our master link assemblies are manufactured to standard US dimensions corresponding to the A345/A342 standard profiles. They comply entirely with international crane hardware standards including ASME B30.26, ASME B30.9, and can be certified for specific ocean cargo applications if requested.
A: As a quality-driven factory, every wholesale shipment comes accompanied by a Mill Test Certificate, verifying material chemistry, heat numbers, tensile strength validation, and 100% proof load testing logs.
A: For our standard US type sizes in red powder-coated finishes, we maintain regular raw forging stocks, making our standard shipping lead time around 25-35 days depending on the volume. Standard MOQ depends on specific weight sizes; please message our export sales desk with your inventory list to get immediate container volume discounts!
