Surya Tamper Marker Pen for Loose Nut Bolt Detection | Industrial Inspection Marker.

Surya Tamper Marker Pen is an industrial tamper evident marker for loose nut bolt detection and torque seal inspection. Once a fastener is tightened to specification, a line drawn across the nut, bolt, and adjoining surface gives a clear visual reference. If the joint shifts under vibration, the line breaks out of alignment and the movement is visible during a routine check, without special tools or a full teardown.

The 30ml pack suits maintenance teams, workshops, and field service kits. It is available in Orange, White, Red, Yellow, Blue, and Green, so teams can separate inspection cycles or mark different machine sections.

Vibration is a common cause of lost bolt tension. Equipment in railway, aerospace, oil and gas, automobile, shipbuilding, and power plant operations runs under constant movement, and a loose fastener can cause downtime or safety risks. A visible torque seal makes vibration safety checks quick enough to perform often.

For reliable results, clean the bolt, nut, and surface, and make sure they are dry. Draw a continuous line across the nut and the adjoining part, and let it set as described on the label. Cap the marker after use.

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