Crosby A-336 Lok-A-Loy Grade 63 Coupling Link
- Proof-load tested on request, up to 1,200 T
- Test certificate with every item
- IRS · ABS · LRS · BV certification
- Price, stock and lead time within one working day
Crosby A-336 Lok-A-Loy Grade 63 Coupling Link, working load limit 1.47 t to 26.1 t, 8 sizes.
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Price, stock and lead time by email, usually within one working day. Ask for test certificates with your enquiry.
Crosby A-336 Lok-A-Loy® Connecting Links are forged alloy steel couplers used for connecting chain, master links, and hooks in various rigging assemblies. While they share a similar form to the A-1337 coupling links, the A-336 series carries a lower Working Load Limit (WLL) and must be applied with care when integrated into Grade 80 chain sling systems.
Key Features
Forged alloy steel construction – quenched and tempered for superior strength and reliability.
Individually proof tested at 2.5× Working Load Limit (WLL) with certification.
4:1 design factor for dependable performance.
Lok-A-Loy® design allows easy assembly and disassembly using standard link sleeves and pins.
Meets applicable performance requirements of ASME B30.26 for rigging hardware.
Permanent identification markings include Working Load Limit, chain size, and Crosby name for traceability.
Important: The Crosby A-336 Lok-A-Loy® 6 Connecting Link can be used in lifting applications, but its Working Load Limit is lower than that of Grade 80 chain.
When incorporated into a Grade 80 chain sling, the sling must be downrated to match the lower WLL of the A-336 coupler.
Per ASME B30.9c, the Working Load Limit of a sling cannot exceed the lowest-rated component in the system.
Not recommended for Grade 100 or higher systems — use the A-1337 coupling link instead.
Specifications
- Stock No.
- Chain Size (in)
- Working Load Limit (lbs)
- Weight Each (lb)
- Diameter of Hole to Accept Link (in)
- 1014397
- 1/4
- 3,250
- 0.24
- 0.50
- 1014413
- 3/8
- 6,600
- 0.58
- 0.66
- 1014431
- 1/2
- 11,300
- 1.20
- 0.88
- 1014459
- 5/8
- 16,500
- 2.42
- 1.06
- 1014477
- 3/4
- 23,000
- 3.89
- 1.19
- 1014495
- 7/8
- 28,750
- 6.08
- 1.38
- 1014510
- 1
- 38,750
- 7.03
- 1.47
- 1014538
- 1-1/4
- 57,500
- 13.20
- 1.73
- 4:1 Design Factor. Individually proof tested at 2.5× WLL. Meets ASME B30.26 requirements. When used in Grade 80 slings, overall sling WLL must be reduced to match the A-336 component.
Sizes and working load limits
| Size | Size (mm) | Working load limit | Crosby part no. | Enquire |
|---|---|---|---|---|
| 9/32" | 7.1 | 1.47 t | 1014397 | |
| 3/8" | 9.5 | 2.99 t | 1014413 | |
| 1/2" | 12.7 | 5.13 t | 1014431 | |
| 5/8" | 15.9 | 7.48 t | 1014459 | |
| 3/4" | 19 | 10.4 t | 1014477 | |
| 7/8" | 22.2 | 13 t | 1014495 | |
| 1" | 25.4 | 17.6 t | 1014510 | |
| 1-1/4" | 31.8 | 26.1 t | 1014538 |
Prices, stock and lead times on request. Every item can be supplied with a test certificate; proof-load testing in our own test house on request.
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Need a price, stock check or certificates?
Add sizes to your enquiry list, or send us the load and application — we reply within one working day.