Wiseman HSS UNEF Hexagon Die Nuts – Unified Extra Fine Right Hand Thread

Wiseman HSS UNEF Hexagon Die Nuts are manufactured from High Speed Steel (HSS) and designed for repairing, cleaning and restoring damaged or worn external UNEF (Unified National Extra Fine) threads.

These precision-engineered hexagon die nuts feature a fixed, non-adjustable design and can be operated using a suitable spanner or socket, making them particularly useful for maintenance, repair and general engineering applications.

UNEF threads feature an extra-fine pitch compared to UNC and UNF threads of the same nominal diameter, making them suitable for applications requiring fine thread adjustment, shallow thread depths and threaded connections in thin-walled components.

Manufactured with a right-hand thread profile, these die nuts are suitable for restoring existing UNEF threads on bolts, studs and other externally threaded components.

Key Features

• High Speed Steel (HSS) – Durable construction for reliable thread restoration and maintenance.

• UNEF Thread Form – Designed for Unified National Extra Fine external threads.

• Right Hand Thread – Standard clockwise tightening thread direction.

• Hexagon Design – Can be operated using a suitable spanner or socket.

• Thread Repair & Restoration – Ideal for cleaning, chasing and restoring damaged or worn external threads.

• Fixed Die Nut – Non-adjustable design for consistent thread engagement.

• Extra Fine Pitch – Suitable for applications requiring finer thread pitches than UNC or UNF.

• Uncoated Finish – Traditional HSS construction without additional surface coating.

• Professional Quality – Manufactured by Wiseman Threading Tools for engineering and maintenance applications.

Applications

Suitable for:

• Repairing damaged UNEF threads on bolts and studs.

• Cleaning existing extra-fine external threads.

• Restoring worn or contaminated threads.

• Precision engineering and workshop maintenance.

• Automotive, aerospace and machinery maintenance where UNEF threads are specified.

• Maintenance of thin-walled threaded components.

• Applications requiring extra-fine imperial thread pitches.

Recommended Use

Select the correct UNEF thread size and pitch to match the existing external thread.

Position the die nut squarely onto the thread and rotate using a suitable spanner or socket. Apply an appropriate cutting lubricant where required and avoid excessive force.

Hexagon die nuts are primarily intended for thread cleaning, chasing and restoration rather than cutting new threads from plain bar stock.

Important

• Suitable for UNEF (Unified National Extra Fine) right-hand external threads only.

• Not compatible with UNC, UNF, metric or other thread forms.

• Non-adjustable hexagon die nut.

• Ensure the correct thread diameter and threads per inch (TPI) are selected before use.