Crosby Master Links
The master link sits at the top of the rigging assembly — the single point where multi-leg slings, hooks, and lifting hardware all converge before connecting to the crane. Getting that connection right matters, and Crosby A-347 welded master links are the standard call on most industrial rigging programs.
Holloway Houston stocks Crosby master links in Houston and ships nationwide.
About Crosby Master Links
Master links connect multi-leg sling assemblies to crane hooks and below-the-hook devices. The link body needs to handle the combined load from all sling legs while fitting the crane hook - geometry and WLL both matter on the specification.
Crosby's A-347 welded master link assembly is one of the most widely specified master links in North American industrial rigging. The alloy steel body is welded, heat-treated, and proof-tested, with WLL markings per ASME B30.9-2018 (Slings), which governs the hardware used with sling assemblies.
The A-series designation covers standard welded master link bodies. Crosby also produces oblong master links and pear-shaped master links in the catalog for applications where hook geometry or sling leg angle requires a different body profile.
Holloway Houston carries Crosby master links with same-day shipping from Houston on in-stock sizes.
Types of Crosby Master Links
Welded Master Link Assemblies (A-347)
The A-347 welded master link assembly is the standard Crosby master link for sling assembly use. Alloy steel body, welded and heat-treated, proof-tested with certificate. The oval body profile fits standard crane hook throats across a range of hook sizes. WLL is marked on the body per ASME B30.9-2018 (Slings).
Oblong Master Links
Oblong master links have a longer, narrower body than the standard oval. They're used where the sling legs need more room inside the link or where the connection geometry requires a longer bearing surface. Crosby oblong master links are alloy steel, heat-treated and proof-tested.
Pear-Shaped Master Links
Pear-shaped master links widen at the bottom and narrow at the top to fit the crane hook throat more closely while providing more room at the bottom for sling connections. The tapered geometry helps keep the link seated in the hook and prevents the assembly from spinning out of position.
Crosby Master Link Sizes and Working Load Limits
Crosby master links cover WLL ranges across standard rigging and sling assembly requirements. The A-347 series spans typical crane rigging capacities from light sling work through heavy industrial lifting.
Materials:
- Alloy steel body, welded and heat-treated
- Proof-tested per manufacturer standards
- WLL marked on body per ASME B30.9-2018 (Slings)
Marking:
- WLL and manufacturer identification on the body
- Proof test certificate available
Why Crosby for Master Links
The A-347 welded master link is what most riggers are thinking of when they order a master link by default. That specification history comes from consistent performance in offshore, petrochemical, and general industrial rigging programs over decades.
Crosby's alloy steel sourcing, welding process, and heat treatment produce a master link body with the fatigue life and impact resistance those applications demand. Proof test certificates ship with every link, satisfying documentation requirements on equipment registers and third-party audits.
Holloway Houston also offers rigging inspection services. Our qualified inspectors examine master links and sling assemblies per ASME B30.9-2018 (Slings) and OSHA standards.
Shop Crosby Master Links by Type
- Crosby A-347 Welded Master Link Assemblies
- Crosby Oblong Master Links
- Crosby Pear-Shaped Master Links
Crosby Master Link Applications by Industry
- Offshore and Marine - Top hardware on multi-leg sling assemblies for platform maintenance, module picks, and vessel rigging where proof test documentation is required.
- Petrochemical and Refinery - Turnaround rigging where the master link connects multi-leg wire rope and chain sling assemblies to crane hooks.
- Structural Steel Erection - Multi-piece picks where beam, column, and panel sling legs gather at a single crane connection point.
- General Industrial - Maintenance rigging, shop crane work, and any application where multiple sling legs converge at a single lift point.
- Mining and Aggregates - Mill and conveyor maintenance rigging where sling assemblies carry irregular loads requiring multi-leg configurations.
Why Holloway Houston for Crosby Master Links
Holloway Houston is an authorized Crosby distributor with over 65 years in the rigging and lifting business, operating from Houston, Texas. We stock Crosby master links alongside shackles, connecting links, and the full sling assembly hardware line.
Our rigging specialists can help match master link body profile and WLL to your crane hook and sling configuration. We also offer rigging inspection services.
Frequently Asked Questions
The Crosby A-347 is a welded alloy steel master link assembly for use with
sling assemblies in crane rigging. It is heat-treated and proof-tested,
with WLL markings per ASME B30.9-2018 (Slings). The A-347 is the standard
reference master link in most North American industrial rigging
specifications and ships with a proof test certificate.
Master links used with sling assemblies fall under ASME B30.9-2018
(Slings), which governs design factors, WLL marking, and inspection
requirements for sling hardware. OSHA 1910.184 references sling hardware
in general industry; OSHA 1926.251 addresses rigging hardware on
construction jobsites.
An oval master link has a symmetrical curved body suited to standard crane
hook throats. An oblong master link has a longer, narrower body that
provides more interior room for sling eyes or chain legs. The correct
selection depends on the crane hook geometry and the number and size of
sling components attaching to the link.
Holloway Houston stocks Crosby master links in our Houston warehouse with
same-day shipping on in-stock items. Call 1-888-496-4700 to confirm
availability on a specific size and body profile.
Complete Your Sling Assembly
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Crosby Shackles - Anchor and chain shackles for sling leg connections below the master link.
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Crosby Connecting Links - Connecting links for chain sling legs attaching to master links.
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Crosby Hooks - Hooks for below-the-hook devices paired with sling and master link assemblies.
DISCLAIMER
Master links are load-bearing rigging components. Selection, inspection, and use call for training consistent with ASME B30.9-2018 (Slings) and applicable OSHA standards. The information on this page is provided for general product awareness and does not replace qualified engineering judgment, manufacturer documentation, or site-specific rigging procedures.