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Coupling Nuts
As of: Monday, November 9, 2026
Standard Features
- Heavy hex
Coupling nuts are long nuts used to connect pieces of threaded rod or other male threaded fasteners.
Coupling Nut Dimensions
| Part# | Thread Size | Length | Flat | Safe Load* |
|---|---|---|---|---|
| 14638 | 1/4-20 UNC | 1.75 in | 0.44 in | 500 lb |
| 14650 | 3/8-16 UNC | 1.75 in | 0.62 in | 1,500 lb |
| 14663 | 1/2-13 UNC | 1.75 in | 0.87 in | 3,000 lb |
| 14681 | 5/8-11 UNC | 2.12 in | 1.06 in | 7,500 lb |
| 14691 | 3/4-10 UNC | 2.25 in | 1.25 in | 10,000 lb |
| *Do not exceed the safe load. | ||||
| Part # | Description | List Price |
|---|---|---|
| 14638 | 7/16 Heavy HEX Width Across Flats=7/16 Length=1-3/4 Steel Zinc Plated Minimum Tensile Strength=60000 Psi Safe Load=500 Lbs | List Price: $8.50 |
| 14650 | 5/8 Heavy HEX Width Across Flats=5/8 Length=1-3/4 Steel Zinc Plated Minimum Tensile Strength=60000 Psi Safe Load=1500 Lbs | List Price: $8.50 |
| 14663 | 7/8 Heavy HEX Width Across Flats=7/8 Length=1-3/4 Steel Zinc Plated Minimum Tensile Strength=60000 Psi Safe Load=3000 Lbs | List Price: $8.50 |
| 14681 | 1-1/16 Heavy HEX Width Across Flats=1-1/16 Length=2-1/8 Steel Zinc Plated Minimum Tensile Strength=60000 Psi Safe Load=7500 Lbs | List Price: $11.50 |
| 14691 | 1-1/4 Heavy HEX Width Across Flats=1-1/4 Length=2-1/4 Steel Zinc Plated Minimum Tensile Strength=60000 Psi Safe Load=10000 Lbs | List Price: $12.50 |
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