Import Api Master Gauge — Buy in Bulk from Supplier in China

The API Master Gauge is a precision reference instrument used to verify and calibrate threaded connections on oilfield tubulars and related equipment. This gauge from Baoji Thread Gages Co., Ltd. is designed for accuracy and repeatability in measuring API thread forms, including round and buttress profiles. The instrument features a high-resolution display and a user-friendly interface for operation in workshop or field conditions. Its housing is built to withstand harsh industrial environments, including exposure to cutting fluids, dust, and temperature variation. The supplier is located in Baoji, Shaanxi Province, China, a region with established manufacturing capacity for gauges and precision tooling.

Master gauges for API threads are typically manufactured from high-carbon high-chromium tool steel such as AISI D2 or equivalent grades, heat-treated to 58-62 HRC for wear resistance and dimensional stability. The thread flanks and pitch diameters are lapped or ground to tolerances specified in API 5B, with calibration traceable to national length standards. Standard API master gauges include plug gauges for internal threads and ring gauges for external threads, each marked with go and no-go designations. Wear allowance, pitch diameter, and thread form are controlled to millionths of an inch or micrometre-level precision. Temperature compensation and thermal stability are critical for repeatability in uncontrolled environments.

Applications span petroleum measurement laboratories, pipe manufacturing facilities, threading service companies, and quality control departments within oilfield service firms. The gauge enables compliance with API specifications during production, repair, and inspection of casing, tubing, and line pipe threads. The listing indicates flexible minimum order quantities and references secure payment options including letters of credit and telegraphic transfer. Buyers should confirm current pricing, delivery schedules, and whether factory calibration certificates and traceability records are included with each gauge.

Baoji Thread Gages Co., Ltd. is located at No. 88 Baoguang Road, Baoji 721006, Shaanxi Province, China. The city of Baoji is recognised within China for its concentration of gauge and tooling manufacturers, supported by local steel and machining industries. The supplier is classified as an imported-tier vendor with harbour trust tier, similar to the first listing, and shows a 0.00% response rate with zero average response hours on the platform. This lack of engagement means buyers must establish contact directly through the Baoji address or by other means to discuss technical requirements and order placement.

The company profile as presented does not disclose year of establishment, number of employees, annual output, specific machinery inventory, or client list. No ISO 9001, ISO 17025, or API Q1 certification details are provided in the source material. The listing emphasises precision measurement and durability but does not state whether Baoji Thread Gages Co., Ltd. manufactures the gauges in-house or sources them from a third party. Buyers should request a factory audit, quality manual, and evidence of calibration laboratory accreditation if third-party calibration is offered.