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Description du produit
Crosby A-1343 Welded Master Links are designed for use as the primary top link in chain sling assemblies, providing a strong and reliable connection point for overhead lifting applications. These links are commonly used in single-leg and multi-leg sling configurations, ensuring proper load distribution and secure lifting performance.
Manufactured from high-strength alloy steel and fully welded, the A-1343 offers excellent durability and structural integrity for demanding industrial and offshore lifting environments.
Material:
Body: Alloy steel
Heat treatment: Quenched and tempered for strength and toughness
Specifications:
Designed for top connection in chain sling assemblies (single or multi-leg)
Compatible with Grade 100 and Grade 80 chain slings
5:1 design factor (ultimate strength = 5× Working Load Limit)
Individually proof tested with certification
Proof testing performed using special fixtures to prevent localized point loading
Each link marked with:
Product Identification Code (PIC) for traceability
Size, grade, and manufacturer identification
Meets or exceeds ASME B30.26 and EN 1677-4 standards
Fatigue rated for repeated lifting cycles (approx. 20,000 cycles)
Uses:
Top link for chain sling assemblies
Overhead lifting and rigging
Industrial and construction lifting operations
Offshore and heavy-duty applications
Key Features:
High strength design – Welded Grade 100 alloy steel construction
Reliable connection – Primary lifting point for sling systems
Proof tested – Certified for safe lifting applications
Traceability – PIC marking ensures full material tracking
Durable performance – Designed for heavy-duty environments
Fatigue resistant – Suitable for repeated lifting cycles
| Stock No. | Weight Each (lb) | Grade 100 Chain Sling - Single Leg Chain Size (in) | Grade 100 Chain Sling - Double Leg Chain Size (in) | Grade 80 Chain Sling - Single Leg Chain Size (in) | Grade 80 Chain Sling - Double Leg Chain Size (in) | Working Load Limit (lb) | Proof Load (lb) | Dimension A (in) | Dimension B (in) | Dimension C (in) | Dimension G (in) | Engineered Flat Size for S-1325A (in) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1247051 | 0.8 | 6 mm, 9/32 | 6 mm | 6 mm, 9/32 | 6 mm, 9/32, 5/16 | 7,000 | 17,632 | 0.51 | 2.36 | 4.72 | 0.26 | 6 mm, 9/32, 5/16 |
| 1247087 | 1.9 | 5/16, 3/8 | 9/32 | 5/16, 3/8 | 5/16 | 9,000 | 22,701 | 0.67 | 3.54 | 6.30 | 0.33 | 3/8 |
| 1247096 | 2.3 | 3/8, 1/2 | 5/16 | 3/8, 1/2 | 3/8 | 14,700 | 37,027 | 0.75 | 3.54 | 6.30 | 0.33 | 3/8, 1/2 |
| 1247122 | 5.2 | 3/8, 1/2 | 3/8 | 3/8, 1/2 | 3/8 | 15,400 | 38,570 | 0.87 | 5.71 | 10.83 | 0.41 | 1/2 |
| 1247120 | 3.6 | 3/8, 1/2 | 3/8 | 5/8 | 3/8 | 19,400 | 48,188 | 0.87 | 3.94 | 7.09 | 0.41 | 1/2 |
| 1247126 | 6.7 | 1/2 | 3/8 | 1/2, 5/8 | 3/8 | 19,600 | 48,929 | 0.98 | 5.71 | 10.83 | 0.53 | 5/8 |
| 1247124 | 5.3 | 5/8, 1/2 | 3/8 | 5/8 | 1/2 | 25,300 | 63,475 | 0.98 | 4.53 | 8.27 | 0.53 | 5/8 |
| 1247133 | 8.5 | 5/8, 1/2 | 1/2 | 5/8 | 1/2 | 28,600 | 71,630 | 1.10 | 5.71 | 10.83 | 0.53 | 5/8 |
| 1247142 | 10.6 | 5/8, 3/4 | 1/2 | 3/4 | 5/8 | 37,400 | 93,670 | 1.26 | 5.71 | 10.83 | 0.66 | — |
| 1247151 | 15.2 | 3/4 | 5/8 | 3/4, 7/8 | 3/4 | 52,900 | 132,240 | 1.42 | 6.10 | 11.22 | — | — |
| 1247163 | 16.1 | 7/8 | 3/4 | 7/8 | 7/8 | 69,400 | 173,675 | 1.57 | 5.51 | 10.63 | — | — |
| 1247164 | 28.4 | 1 | 7/8 | 1 | 1 | 84,400 | 210,923 | 1.77 | 7.09 | 13.39 | — | — |
| 1247166 | 42.1 | 1, 1-1/4 | 7/8 | 1 | 1 | 99,200 | 247,950 | 2.01 | 8.46 | 15.35 | — | — |
| 1247175 | 55.3 | 1-1/4 | 1 | 1-1/4 | 1-1/4 | 147,600 | 369,170 | 2.17 | 7.99 | 15.98 | — | — |
Series: Grade 100 A-1343 Welded Master Link
Design Factor: 5:1. Applications with wire rope and synthetic slings generally require a 5:1 Design Factor.
Load Rating: Ratings are based on a single-leg sling in an in-line load, or the resultant load on multiple legs with an included angle less than or equal to 120 degrees.
Proof Test: Proof Test Load equals or exceeds the requirements of ASTM A952 (8.1) and ASME B30.9.
Chain Sling Design Factor: Chain slings require a 4:1 Design Factor. Refer to Crosby Applications & Warnings to determine the product's actual Ultimate Load.
Manufactured Flats: There are no manufactured flats on links over 1-1/4 in (32 mm).
* Grade 80 Models: Master links identified with an asterisk (*) are Grade 80 and painted gold.
| Specification | Value |
|---|---|
| Series | A-1343 |
| Type | Welded |
| Material | Alloy Steel |