Taper Gages For Thread Taper Inspection
Rotary Shouldered Connection Thread Inspection
Thread Taper is the change in pitch diameter over the length of a connection, typically designated in metric. For all rotary shouldered connections, measuring thread taper is not only an industry wide practice; it is an API mandated inspection.
During the manufacturing process, taper must be accurately measured and quantified to avoid mismatched tapers. When under a service load, mismatched tapers between pins and boxes diminish proper thread engagement resulting in reduced connection performance.
| P/N | Model | Measuring Range | Travel | Resolution |
| ETG1129-RSC | JZW5 | 1-1/2″~9″, External Taper,RSC | 0～1 in | 0.0005in |
| ITG1129-RSC | JZN06Z | 1-1/2″~9″, Internal Taper,RSC | 0～1in | 0.0005in |
API Contact Points for Taper Gages
FYOU PMEC’s standard ball contact points are manufactured with carbide balls. Taper gages require two contact points. Contact points are sold individually.
| Model | Point Diameter | Threads Per Inch | Connection Type |
| CP235 | 0.235” | 3 | Hughes Slim Line H-90 |
| CP200 | 0.200” | 3.5 | All Hughes H-90 |
| CP144 | 0.144” | 4 | API Rotary Shouldered Connections |
| CP115 | 0.115” | 5 | API Rotary Shouldered Connections |
| CP096 | 0.096” | 6 | API Rotary Shouldered Connections |