API thread gauges — not pressure gauges — licensed to API 5B and API 7-2 for casing, tubing, line pipe, and rotary shouldered connections, with field-ready packaging and traceable calibration.
License #5B-0039
Threading, gauging, and inspection of casing, tubing, and line pipe threads
License #7-2-0023
Threading and gauging of rotary shouldered thread connections
API gauges in this catalogue are API thread gauges — not pressure gauges, tank gauges, or leak testers. They inspect thread connections on casing, tubing, drill pipe, and other oilfield equipment so those joints stay within API 5B and API 7-2 geometry under downhole load.
DSN Enterprises is a licensed API manufacturer (API 5B-0039 and API 7-2-0023), producing certified gauges for petroleum industry applications. Our API gauges are manufactured to strict API specifications and undergo rigorous quality control to ensure compliance with industry standards.
Complete range of API certified gauges for oil and gas industry thread inspection and quality control.
API 5B & 7-2 Certified
Certified API thread plug gauges for inspection of internal threads on casing, tubing, line pipe, and rotary shouldered connections used in oil and gas drilling operations.
API 5B & 7-2 Certified
Certified API thread ring gauges for inspection of external threads on pins, couplings, and rotary shouldered connections in petroleum industry applications.
Reference Standards - API 5B & 7-2
High-precision master gauges used as reference standards for calibrating working API gauges. Essential for maintaining accuracy in quality control laboratories.
Sizes: 4-1/2" to 20" - API 5B
Complete range of API casing thread gauges for inspection of casing connections. Available in round thread (CSG), buttress (BCSG), and extreme line patterns.
Sizes: 1.050" to 4-1/2" - API 5B
API tubing thread gauges for inspection of tubing connections used in oil well completion. Available in EUE (External Upset End) and NUE (Non-Upset End) configurations.
NC, IF, REG, FH - API 7-2
API 7-2 certified gauges for rotary shouldered thread connections used on drill pipe, drill collars, and bottom hole assemblies in drilling operations.
DSN Enterprises manufactures API gauges in full conformity with API Specification 5B and 7-2. Every gauge is certified, calibrated, and traceable to API master gauges, ensuring precision thread inspection for oilfield tubulars and rotary shouldered connections.
Covers threading, gauging, and thread inspection of casing, tubing, and line pipe threads. Includes requirements for:
Covers threading and gauging of rotary shouldered thread connections used on drill pipe and BHA. Includes:
| Material | OHNS (W) / Tungsten Carbide |
| Hardness | 60 ± 2 HRC |
| Treatment | Sub-Zero at -80°C |
| Thread Form | As per API 5B / 7-2 |
| Calibration | Traceable to API Standards |
| Certificate | API Certificate Included |
As an API licensed manufacturer, we provide certified gauges for the oil and gas industry. Contact us for specifications, pricing, and delivery information.