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Product Description
The Crosby O-319 Chain Nest Hook is designed as a replacement hook assembly for chain hoists and lifting systems requiring frequent rotation under load. Featuring a ball bearing swivel and Crosby® 319 shank hook with QUIC-CHECK® deformation indicators, the O-319 provides dependable load engagement and reliable lifting performance in demanding industrial environments.
Manufactured from forged alloy steel and heat treated for durability, the O-319 Chain Nest Hook delivers high strength, smooth rotation, and dependable operation for hoist chain applications.
Material:
Forged alloy steel hook
Quenched and tempered steel construction
Alloy chain connecting pin
Zinc-plated finish for corrosion resistance
Specifications:
Chain nest hook with ball bearing swivel
Designed for chain hoist replacement applications
Suitable for frequent rotation under load
Utilizes Crosby® 319 shank hook with QUIC-CHECK® deformation and angle indicators
Fits hoist chain sizes from 1/4" through 9/16"
Entire assembly zinc plated for corrosion resistance
Repair kit available consisting of bearing and spring pin
Product Identification Code (PIC) for traceability
4:1 design factor
Meets ASME B30.10 requirements
Uses:
Chain hoist replacement assemblies
Industrial lifting systems
Manufacturing and material handling
Construction lifting applications
Frequent rotation hoist operations
Key Features:
Ball bearing swivel – Allows smooth rotation under load
QUIC-CHECK® indicators – Helps identify deformation and improper hook angles
Forged construction – Built for demanding lifting environments
Corrosion resistant – Zinc-plated finish extends service life
Traceable identification – PIC system supports inspection and compliance
Frequent rotation capability – Designed for repetitive hoist applications
| Chain Size (in) | Stock No. | Working Load Limit (short tons) | Weight Each (lb) | Chain Nest Outside Diameter (in) | Deformation Indicator Distance (in) | Pin Centerline to Top of Housing (in) | Chain Nest Housing Height (in) | Connecting Pin Diameter (in) | Hook Body Thickness (in) | Hook Depth Below Saddle (in) | Hook Tip Height Above Saddle (in) | Hook Neck Thickness (in) | Overall Hook Width (in) | Hook Reach to Swivel Base (in) | Replacement Trigger Kit Stock No. |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 - 9/32 | 1098312 | 1.5 | 2.55 | 1.75 | 2.00 | 0.70 | 2.62 | 0.31 | 0.75 | 1.00 | 1.53 | 1.00 | 3.62 | 2.69 | 1096421 |
| 5/16 - 3/8 | 1098334 | 2.1 | 4.00 | 2.13 | 2.00 | 0.70 | 3.19 | 0.38 | 0.84 | 1.12 | 1.72 | 1.12 | 4.09 | 3.06 | 1096468 |
| 3/8 - 7/16 | 1098356 | 3.8 | 10.00 | 3.00 | 2.50 | 1.00 | 4.38 | 0.50 | 1.12 | 1.44 | 2.12 | 1.34 | 4.84 | 3.78 | 1096515 |
| 1/2 - 9/16 | 1098378 | 3.8 | 10.00 | 3.00 | 2.50 | 1.00 | 4.38 | 0.63 | 1.12 | 1.44 | 2.12 | 1.34 | 4.84 | 3.78 | 1096515 |
Series: O-319 Chain Nest Hooks
Material: Forged alloy steel hooks, quenched and tempered.
Finish: Entire assembly is zinc plated.
Design Factor: 4:1.
Swivel: Fitted with ball bearings and suitable for frequent rotation under load.
Connection: Attaches to chain using an alloy connecting pin.
Hook: Uses a Crosby 319-style shank hook incorporating QUIC-CHECK® deformation and angle indicators.
* Deformation Indicator: The AA measurement is Crosby's QUIC-CHECK® deformation indicator dimension.
Inspection: Use in corrosive environments requires inspection of the shank and nut in accordance with ASME B30.10.
| Specification | Value |
|---|---|
| Trade Size | 1/2 to 9/16in |
| Suitable For Use With | Chain Hoists |
| Series | O-319 |
| Material | Forged Alloy Steel |
| Finish | Zinc Plated |