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Product Description
A Thread Height Gauge for BOX is a precision metrology tool specifically designed to measure and verify the thread height of box-end connections (female threads) in oil and gas tubular goods, such as casing, tubing, and drill pipes. Compliant with API 5B, ISO 1502, and ASME B1.3 standards, this gauge ensures thread profile accuracy, preventing leaks, galling, and connection failures in critical drilling, completion, and production operations.
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ApplicationsCasing/Tubing Inspection: Verify box threads in API 5CT/5B casing and tubing.
Drill Pipe Maintenance: Ensure thread integrity in drill pipe connections.
Manufacturing QC: Validate thread height in CNC-machined oilfield components.
Refurbishment: Inspect used threads during reconditioning of downhole tools.
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Key FeaturesAPI/ISO Compliance
Precision-machined to match API 5B, ISO 1502, and ASME thread profiles.
Ultra-Durable Materials
Hardened tool steel, tungsten carbide, or ceramic for wear resistance in harsh environments.
High-Accuracy Measurement
Ground to tolerances of ±0.001 mm (±0.00004") for critical thread height verification.
Ergonomic Design
Compact, lightweight, and easy to handle in field or workshop conditions.
Traceable Certification
Includes NIST-traceable calibration certificate for audit compliance.
✅ Quality Assurance
Ensures thread conformity to API standards, minimizing connection failures.
✅ Cost Savings
Reduces downtime and repair costs by detecting thread defects early.
✅ Durability
Resists corrosion, abrasion, and deformation in oilfield environments.
✅ Versatility
Compatible with manual inspection, CMMs, or automated quality control systems.
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Comment & FAQ
1. How often should the gauge be recalibrated?
A: Annual recalibration is recommended, or per API audit/ISO 17025 requirements.
2. Can you customize gauges for non-API threads?
A: Yes – we design gauges for proprietary, metric, or modified thread profiles.
3. Why choose tungsten carbide over steel?
A: Tungsten carbide offers superior wear resistance, ideal for high-volume inspections.
4. Is the gauge compatible with digital measurement systems?
A: Yes – polished surfaces work with optical scanners and laser measurement tools.
5. Do you provide multi-thread gauge kits?
A: Yes – bundled kits for common API sizes (e.g., 4½" to 9⅝" casing) are available.
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Technical Specifications| Parameter | Specifications |
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| Material | Tungsten Carbide, Tool Steel, Ceramic |
| Thread Standards | API 5B (Buttress, Round), ISO 1502, ASME B1.3 |
| Measurement Range | 0.5–6 mm (metric), 0.02"–0.25" (imperial) |
| Accuracy | ±0.001 mm (±0.00004") |
| Surface Finish | < 0.1 µm Ra (mirror polish) |
| Calibration | NIST-traceable, ISO 17025-certified |
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Data Sheet
| Model | Applicable Connection | Measure Range |
| ITH01 | 1"~4-1/2" TBG, UPTBG ≤4-1/2" CSG | 0-5mmX0.01mm |
| ITH02 | ≤ 4-1/2" CSG | 0-5mmX0.01mm |
| ITH03 | 1"~4-1/2" TBG, UPTBG ≤ 4-1/2" CSG | 0.25inX0.0005in |
| ITH04 | ≤ 4-1/2" CSG | 0.25inX0.0005in |
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Customer Reviews
⭐⭐⭐⭐⭐
“These gauges are essential for our API 5B thread inspections. The tungsten carbide version has lasted 3x longer than steel in our sandy workshop.”
– Quality Control Manager, Oilfield Equipment Manufacturer, China
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“The NIST certificate simplified our API audits. Perfect for checking casing box threads in our Middle East operations.”
– Drilling Engineer, UAE Oilfield Services
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