Thread Profile Gauge Art-Pol 47896 — imperial and metric 0.4–7 mm, 4G–62G, 48 pieces

Thread profile gauge Art-Pol 47896 is a set of 48 measuring leaves designed for checking thread forms in both metric and imperial systems. The set covers nominal sizes from 0.4 to 7 mm and a wide range of thread classes, enabling quick verification of internal and external thread profiles, pitch and form matching on fasteners, tapped holes and machined components. The compact set is suitable for use in workshops, quality control stations and on-site inspections where fast, reliable thread profile checks are required.

Advantages

The gauge set provides precise profile comparison without requiring complex measuring instruments, offering a straightforward visual and tactile method to confirm thread form and pitch. Its 48 leaves allow coverage of many common sizes and classes in a single kit, reducing the need to carry multiple tools. Constructed for repeated use, the thin leaves permit access into tight root and crest areas, making it possible to check both internal and external threads reliably. The combination of metric and imperial leaves increases versatility for mixed-standard environments.

Suitable for

• Inspection of external threads on bolts, studs and screws
• Verification of internal threads in tapped holes and nuts
• Quality control during production and assembly
• Maintenance and field service inspections of fastened joints
• Machining and tool setup where thread form confirmation is required

Key specifications

• Number of leaves: 48
• Nominal size coverage: 0.4–7 mm
• Thread classes covered: 4G–62G
• Includes both metric and imperial profile leaves
• Material: hardened measuring leaves for durability
• Compact storage format for workshop and mobile use

How to use

Select the leaf that corresponds to the expected nominal size and thread class, then place the leaf against the thread crest or into the thread root to check form and pitch engagement. For external threads, align the profile leaf on the thread crest and visually inspect for full contact along the form; for internal threads, insert the appropriate leaf and check that the form matches without gaps. If the profile leaf does not seat properly or shows gaps, select adjacent sizes or classes to determine the deviation. Use good lighting and, if necessary, a magnifier to inspect fine pitches and small sizes.

Usage recommendations

Use the gauge on clean, oil-free threads and avoid excessive force when inserting leaves to prevent damage to the measuring edges. Store the leaves in their case to protect the profiles from bending or contamination. For repeatable results, clean both the part and the leaf before checking and record any deviations for corrective action during machining or assembly operations.