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High-Strength Steel Coupling Nuts—Grade 8
Also known as extension nuts, use these to connect and extend threaded rods. Made from Grade 8 steel, they're about 25% stronger than medium-strength steel coupling nuts. A zinc plating provides corrosion resistance in wet environments.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Zinc-Plated Steel—Grade 8 | |||||
| 1/4"-20 | 7/8" | 1/2" | 000000000 | 000000 | 000000 |
| 5/16"-18 | 7/8" | 1/2" | 000000000 | 00000 | 00000 |
| 5/16"-24 | 7/8" | 1/2" | 000000000 | 00000 | 00000 |
| 3/8"-16 | 1 3/4" | 5/8" | 000000000 | 00000 | 00000 |
| 3/8"-24 | 1 3/4" | 5/8" | 000000000 | 00000 | 00000 |
| 7/16"-14 | 1 3/4" | 3/4" | 000000000 | 00000 | 00000 |
| 7/16"-20 | 1 3/4" | 3/4" | 000000000 | 00000 | 00000 |
| 1/2"-13 | 1 3/4" | 3/4" | 000000000 | 00000 | 00000 |
| 1/2"-20 | 1 3/4" | 3/4" | 000000000 | 00000 | 00000 |
| 5/8"-11 | 2 1/8" | 15/16" | 000000000 | 00000 | 00000 |
| 5/8"-18 | 2 1/8" | 15/16" | 000000000 | 00000 | 00000 |
| 3/4"-10 | 2 1/4" | 1 1/8" | 000000000 | 00000 | 00000 |
| 3/4"-16 | 2 1/4" | 1 1/8" | 000000000 | 00000 | 00000 |
| 7/8"-9 | 2 1/2" | 1 5/16" | 000000000 | 00000 | 00000 |
| 7/8"-14 | 2 1/2" | 1 5/16" | 000000000 | 00000 | 00000 |
| 1"-8 | 2 3/4" | 1 1/2" | 000000000 | 00000 | 00000 |
| 1"-14 | 2 3/4" | 1 1/2" | 000000000 | 00000 | 00000 |
| 1 1/4"-7 | 3" | 1 7/8" | 000000000 | 00000 | 00000 |
| 1 1/2"-6 | 3 1/2" | 2 1/4" | 000000000 | 00000 | 00000 |