API 11B Polished Steel Sucker Rod Coupling - 3ft Length with 5/8" to 1-1/8" Diameter Options
API 11B certified sucker rod couplings manufactured from premium alloy steels including 4330, 4230, and custom formulations. Engineered with advanced production equipment and rigorous quality control for exceptional performance in demanding oilfield applications.
Carbon steel or manganese steel construction ideal for light to medium load applications in non-corrosive or mildly corrosive shallow to deep well pumping operations.
High-quality alloy steel with heat treatment providing superior strength, excellent plasticity, and extended service life. Suitable for non-corrosive environments in deep well applications.
Ni-Cr-Ni-Mo alloy steel formulation offering exceptional corrosion resistance. Designed for shallow, medium, and deep wells with aggressive corrosive conditions.
| Size (in) | Thread D. (in) | Rod D. (in) | Length (ft) | Length of Thread (mm) | Outside Diameter of Pin Shoulder (mm) | Length of Wrench Square (mm) | Width of Wrench Square (mm) |
|---|---|---|---|---|---|---|---|
| 5/8 | 15/16 | 5/8 | 2, 4, 6, 8, 10, 25, 30 | 31.75 | 31.8 | ≥ 31.8 | 22.20 |
| 3/4 | 11/16 | 3/4 | 36.50 | 38.10 | 25.40 | - | |
| 7/8 | 13/16 | 7/8 | 41.28 | 41.30 | - | - | |
| 1 | 13/8 | 1 | 47.63 | 50.80 | ≥ 38.1 | 33.30 | |
| 11/8 | 19/16 | 11/8 | 53.98 | 57.20 | ≥ 41.3 | 38.10 | - |
| Grade | Yield Strength Rel (MPa) | Tensile Strength Rm (MPa) | Percentage Elongation A (%) | Contraction Percentage of Area Z (%) | Impact Toughness a(3/cm²) |
|---|---|---|---|---|---|
| C | ≥ 414 | 620-793 | ≥ 12 | ≥ 55 | ≥ 70 |
| K | ≥ 414 | 620-793 | ≥ 12 | ≥ 55 | ≥ 70 |
| D | ≥ 620 | 794-965 | ≥ 10 | ≥ 50 | ≥ 58.85 |
| AISI | C | Si | Mn | S | P | Cr | Ni | Mo | V | Cu | Al |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1541 | 0.36-0.45 | 0.15-0.35 | 1.35-1.65 | ≤0.04 | ≤0.04 | ≤0.3 | ≤0.35 | ≤0.06 | 0.04-0.09 | ≤0.35 | ≤0.035 |
| 4130 | 0.26-0.33 | 0.17-0.37 | 0.4-0.7 | ≤0.025 | ≤0.025 | 0.8-1.1 | ≤0.3 | 0.15-0.25 | / | ≤0.2 | / |
| 4120 | 0.17-0.24 | 0.17-0.37 | 0.4-0.7 | ≤0.025 | ≤0.025 | 0.8-1.1 | ≤0.3 | 0.15-0.25 | / | ≤0.2 | / |
| 4138 | 0.37-0.45 | 0.17-0.37 | 0.9-1.2 | ≤0.025 | ≤0.025 | 0.9-1.2 | ≤0.3 | 0.2-0.3 | / | ≤0.2 | / |
| 4138M | 0.37-0.45 | 0.17-0.37 | 0.9-1.2 | ≤0.025 | ≤0.025 | 0.9-1.2 | ≤0.3 | 0.2-0.3 | 0.04-0.09 | ≤0.2 | / |
| 4140 | 0.38-0.45 | 0.17-0.37 | 0.5-0.8 | ≤0.025 | ≤0.025 | 0.9-1.2 | ≤0.3 | 0.15-0.25 | 0.04-0.09 | ≤0.2 | / |
| 4142 | 0.38-0.45 | 0.17-0.37 | 0.5-0.8 | ≤0.025 | ≤0.025 | 0.9-1.2 | ≤0.3 | 0.15-0.25 | 0.04-0.09 | ≤0.2 | / |
| 3130 | 0.22-0.29 | 0.15-0.35 | 0.71-1.0 | ≤0.025 | ≤0.025 | 0.42-0.65 | 0.72-1.0 | 0.01-0.06 | / | ≤0.2 | / |
| 4320 | 0.18-0.42 | 0.15-0.35 | 0.8-1.0 | ≤0.025 | ≤0.025 | 0.7-0.9 | 1.15-1.5 | 0.2-0.3 | 0.04-0.09 | ≤0.35 | ≤0.035 |
| 4330 | 0.3-0.35 | 0.15-0.35 | 0.8-1.1 | ≤0.025 | ≤0.025 | 0.8-1.1 | 1.65-2.0 | 0.2-0.3 | 0.05-0.10 | ≤0.2 | / |
| 4621 | 0.18-0.23 | 0.17-0.37 | 0.7-0.9 | ≤0.025 | ≤0.025 | ≤0.35 | 1.65-2.0 | 0.2-0.3 | / | ≤0.2 | / |
| 4720 | 0.19-0.23 | 0.15-0.35 | 0.85-1.05 | ≤0.025 | ≤0.025 | 0.8-1.05 | 0.9-1.2 | 0.22-0.30 | 0.02-0.05 | 0.40-0.60 | / |
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