1:Tool Joint: NC26, NC31, NC38, NC40, NC46, NC50
2:Type of Tool joint: NC, IF, FH, XH, REG
3:Material: 40Cr, 35CrMo, 4137H
Tool joints are short sections of pipe that are attached to the tubing portion of drill pipe by means of using a flash welding process. The internally threaded tool joint is called a “box”, while the externally threaded tool joint if the “pin”
API specifications also apply to tool joints:
• Minimum Yield Strength = 120,000 psi
| Grade | Internal, external thread joint diameter | The inner diameter of the joint | Internal and external threads, shoulder joint chamfer diameter | Outside screw clamp space joint | Inside screw thread clamp space joint | Internal, external thread joint welding neck diameter |
| E75 | 85.7 | 44.45 | 82.95 | 177.8 | 203.2 | 65.09 |
| X95 | 85.7 | 44.45 | 82.95 | 177.8 | 203.2 | 65.09 |
| G105 | 85.7 | 44.45 | 82.95 | 177.8 | 203.2 | 65.09 |
| E75 | 104.8 | 53.98 | 100.41 | 177.8 | 228.6 | 80.96 |
| X95 | 104.8 | 50.8 | 100.41 | 177.8 | 228.6 | 80.96 |
| G105 | 104.8 | 50.8 | 100.41 | 177.8 | 228.6 | 80.96 |
| S135 | 111.1 | 41.28 | 100.41 | 177.8 | 228.6 | 80.96 |
| E75 | 120.7 | 76.2 | 116.28 | 203.2 | 266.7 | 98.43 |
| E75 | 120.7 | 68.26 | 116.28 | 203.2 | 266.7 | 98.43 |
| X95 | 127 | 65.09 | 116.28 | 203.2 | 266.7 | 98.43 |
| G105 | 127 | 61.91 | 116.28 | 203.2 | 266.7 | 98.43 |
| S135 | 127 | 53.98 | 116.28 | 203.2 | 266.7 | 98.43 |
| E75 | 127 | 65.09 | 116.28 | 203.2 | 266.7 | 98.43 |
| X95 | 127 | 61.91 | 116.28 | 203.2 | 266.7 | 98.43 |
| G105 | 127 | 53.98 | 116.28 | 203.2 | 266.7 | 98.43 |
| S135 | 139.7 | 57.15 | 127.4 | 177.8 | 254 | 98.43 |
| E75 | 133.4 | 71.44 | 127.4 | 177.8 | 254 | 106.36 |
| X95 | 133.4 | 68.26 | 127.4 | 177.8 | 254 | 106.36 |
| G105 | 139.7 | 61.91 | 127.4 | 177.8 | 254 | 106.36 |
| S135 | 139.7 | 50.8 | 127.4 | 177.8 | 254 | 106.36 |
| E75 | 152.4 | 82.55 | 145.26 | 177.8 | 254 | 114.3 |
| X95 | 154.4 | 82.55 | 145.26 | 177.8 | 254 | 114.3 |
| G105 | 152.4 | 82.55 | 145.26 | 177.8 | 254 | 114.3 |
| S135 | 152.4 | 76.2 | 145.26 | 177.8 | 254 | 114.3 |
| E75 | 152.4 | 85.73 | 145.26 | 177.8 | 254 | 119.06 |
| E75 | 158.8 | 85.22 | 145.26 | 177.8 | 254 | 119.06 |
| X95 | 158.8 | 76.2 | 145.26 | 177.8 | 254 | 119.06 |
| G105 | 158.8 | 76.2 | 145.26 | 177.8 | 254 | 119.06 |
| S135 | 158.8 | 69.85 | 145.26 | 177.8 | 254 | 119.06 |
