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

Baoji Thread Gages Co., Ltd. manufactures API thread gauges for dimensional verification of threaded connections in oilfield tubular equipment. These precision instruments inspect API round thread (8-round, 10-round) and buttress thread profiles on casing, tubing, and line pipe in accordance with API 5B dimensional requirements. The gauges functionality extends to checking thread form, pitch diameter, thread height, and lead accuracy on manufactured or repaired connections. Buyers should confirm with the supplier whether their gauge portfolio covers working gauges, master gauges, or reference-grade standards.

Gauge construction typically employs through-hardened alloy tool steel such as AISI O1 or chromium-alloy grades, heat treated to 58 to 64 HRC for wear resistance and dimensional stability. Thread flanks are precision ground and lapped to achieve the 0.025 mm to 0.050 mm tolerances specified in API 5B for working gauges. Some designs incorporate tungsten carbide wear pads on critical contact surfaces to extend calibration intervals. Handle configurations vary: solid one-piece designs suit fixed inspection stations, while modular designs with interchangeable thread segments reduce inventory for multi-size operations. Calibration certificates should trace to national standards (typically NIST or equivalent) with uncertainty budgets stated.

Primary users include oil country tubular goods (OCTG) manufacturers, threading service companies, and inspection firms performing incoming goods verification. The gauges serve in production process control, final inspection, and field audit applications. Baoji Thread Gages Co., Ltd. mentions compact design for portability, suggesting handheld or field-use variants in their range. Buyers must confirm exact thread types covered (API BTC, premium connections, or proprietary profiles), gauge class (working, master, or reference), and calibration certificate inclusion. MOQ flexibility is stated; pricing, specific delivery timelines, and payment terms require direct supplier negotiation.

Baoji Thread Gages Co., Ltd. operates from Baoji, Shaanxi Province, China, with its registered address at No.88 Baoguang Road. Baoji is a recognized concentration of Chinese gauge and measuring tool manufacturing, with established supply chains for tool steel and precision grinding capability. The supplier holds an imported tier classification with harbor trust status on the platform. Like the companion listing, this supplier shows 0.00% response rate and zero average response hours, so direct outreach is essential for engagement.

The company name and location suggest specialized focus on thread gauges rather than general industrial tooling. No ISO 9001 certificate number, laboratory accreditation, or specific gauge manufacturing history is detailed in the available profile. The listing emphasizes portability and ease of reading, implying product design attention to field-use ergonomics. Buyers should request company registration documents, scope of gauge types manufactured, and in-house calibration capability versus third-party laboratory dependency. No information on annual output, export experience, or OEM relationships is disclosed.