Tapered threads are a signature feature of API Tubing & Casing connections. Measuring thread taper is not only an industry wide practice, it is an API Specification 5B mandated inspection. During the manufacturing process, taper must be accurately measured and quantified to stay within the required specification limits. When subjected to a service load, taper error on threaded tubing and casing connections can lead to galling, improper fit, and reduced performance.
| P/N | Model | Measuring Range | Travel | Resolution |
| ETG0010 | JZW1 | 0~10 in, External Taper | 0～0.5in | 0.001in |
| ETG0816 | JZW2 | 8～16 in , External Taper | 0～0.5in | 0.001in |
| ETG0820 | JZW3 | 8～20 in , External Taper | 0～0.5in | 0.001in |
| ETG1405 | JZW4 | 1～4 1/2in , External Taper | 0～0.5in | 0.001in |
| ITG0106 | JZN06 | 1～6in, Internal Taper | 0～1in | 0.001in |
| ITG5516 | JZN16 | 5 1/2~16in, Internal Taper | 0～1in | 0.001in |
During the manufacturing process in any industry, taper must be accurately measured and quantified to avoid mismatched tapers. When subjected to a service load, taper error on threaded connections can lead to galling, improper fit, improper thread engagement, and reduced performance.
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