CLGR® Galvanized Turnbuckle Hook & Hook US Fed. Spec. also known as double hook turnbuckle and hot dipped galvanized turnbuckle hook & hook.
Our double hook turnbuckle is engineered for rapid deployment and heavy-duty tensioning, featuring a hot-dip galvanized finish that provides excellent corrosion resistance in harsh environments.
Forged from super-carbon steel and compliant with US Federal Specification, this turnbuckle delivers reliable performance for temporary fencing, transportation securing, and industrial applications.
The dual hook design enables quick connection and disconnection without tools, while reverse-cut threads provide precise tension adjustment by simple rotation. Each unit is clearly marked with its working load limit (WLL) to ensure safe operation.
Brand | CLGR® |
Technical Notes | Hook & Hook Turnbuckle meet US Federal Specification |
Origin | China |
Material | Superior Carbon Steel (1045) |
Safety Factor | Proof tested to 2×WLL and Minimum Break Force is 5 × WLL. |
Processing | Drop Forged + Machining |
Finish | Hot Dipped Galvanized |
Thread Dia & Take Up(in) | 1/4×4, 5/16×4 1/2, 3/8×6, 1/2×6, 1/2×12, 5/8×6, 5/8×12, 3/4×6, 3/4×12, 3/4×18, 7/8×12, 1×12 |
Tips | Color Code: Customized according to customers’ requirements |

Part No. | Thread Dia | WLL | U.W. | Dimensions(in) | |||||||||
(Ibs) | (Ibs) | A | D | E | F | J | K | M | N | BB | |||
Closed | Open | Closed | Open | Closed | |||||||||
CR-TB-HH-US-01 | 1/4×4 | 400 | 0.33 | 0.25 | 0.44 | 1.67 | 1.27 | 9.79 | 7.38 | 12.2 | 8.2 | 4.07 | |
CR-TB-HH-US-02 | 5/16×4 1/2 | 700 | 0.52 | 0.31 | 0.5 | 2 | 1.5 | 11.58 | 8.58 | 14.08 | 9.58 | 4.58 | |
CR-TB-HH-US-03 | 3/8×6 | 1000 | 0.83 | 0.38 | 0.56 | 2.28 | 1.77 | 15.23 | 10.62 | 17.84 | 11.84 | 6.1 | |
CR-TB-HH-US-04 | 1/2×6 | 1500 | 1.88 | 0.5 | 0.65 | 3.53 | 2.28 | 17.98 | 13.2 | 20.76 | 14.76 | 6.03 | |
CR-TB-HH-US-05 | 1/2×12 | 1500 | 2.77 | 0.5 | 0.65 | 3.51 | 2.28 | 30.27 | 19.49 | 33.05 | 21.05 | 12.36 | |
CR-TB-HH-US-06 | 5/8×6 | 2250 | 3.21 | 0.63 | 0.9 | 4.24 | 2.81 | 19.5 | 14.5 | 22.5 | 16.5 | 6.03 | |
CR-TB-HH-US-07 | 5/8×12 | 2250 | 4.58 | 0.63 | 0.9 | 4.23 | 2.81 | 31.84 | 20.84 | 34.84 | 22.84 | 12.39 | |
CR-TB-HH-US-08 | 3/4×6 | 3000 | 4.2 | 0.75 | 0.98 | 5.07 | 3.33 | 21.19 | 15.98 | 24.4 | 18.4 | 6.13 | |
CR-TB-HH-US-09 | 3/4×12 | 3000 | 6.92 | 0.75 | 0.98 | 5.04 | 3.33 | 33.59 | 22.38 | 36.8 | 24.8 | 12.59 | |
CR-TB-HH-US-10 | 3/4×18 | 3000 | 8.65 | 0.75 | 0.98 | 5.07 | 3.33 | 45.59 | 28.38 | 48.8 | 30.8 | 18.53 | |
CR-TB-HH-US-11 | 7/8×12 | 4000 | 9.85 | 0.88 | 1.13 | 5.82 | 3.78 | 34.89 | 23.52 | 38.26 | 26.26 | 12.16 | |
CR-TB-HH-US-12 | 1×12 | 5000 | 14.8 | 1 | 1.25 | 6.56 | 4.25 | 36.59 | 25.06 | 40.12 | 28.12 | 12.18 | |