Thread Go/No-Go Gauge JBO model 8244160050 for ISO metric threads 6H (go/no-go plug gauge)

JBO thread go/no-go plug gauge model 8244160050 is a precision inspection tool designed for verifying ISO metric internal threads with 6H tolerance. The gauge features two ends: a 'go' end that should enter an acceptable thread and a 'no‑go' end that should not fully engage if the thread meets tolerance. It provides a fast, repeatable method to check major and minor diameters and pitch fit, helping technicians and quality inspectors confirm threaded hole conformity without complex measurement equipment.

Advantages

The two‑ended design delivers immediate pass/fail results, reducing inspection time on the shop floor. Machined to precise tolerances, the gauge offers reliable repeatability and long service life when handled and stored correctly. It is compact and simple to use, making it suitable for bench inspection, in‑process checks, and final quality control. The plug gauge construction minimizes interpretation errors compared with indirect measurement methods.

Suitable for

• Inspection of internal ISO metric threads with 6H tolerance
• In‑process thread checks during machining
• Final quality control in workshops and production lines
• Maintenance and quick verification tasks in assembly

Key specifications

• Thread standard: ISO metric internal threads, 6H tolerance
• Gauge type: go/no‑go plug gauge with two functional ends
• Material: hardened steel construction for wear resistance
• Surface finish: precision ground for accurate engagement
• Usage environment: workshop, inspection bench, production line

How to use

Place the gauge aligned with the threaded hole and gently attempt to insert the 'go' end; it should enter smoothly to indicate acceptability. Then try the 'no‑go' end; it must not fully screw into the hole if the thread is within tolerance. Do not force either end; friction or binding indicates a potential nonconformance or damage. Clean the thread and the gauge before use to avoid false readings caused by chips, burrs, or contamination.

Usage recommendations

Handle the gauge with care, keep it free from nicks and corrosion, and store it in its protective case when not in use. Periodically inspect the gauge for wear and service life; replace or have it calibrated if any damage or excessive wear is found. Use the gauge at moderate ambient temperatures and avoid applying excessive torque to prevent deformation.