Wiseman HSS UNS Hexagon Die Nuts – Unified Special Right Hand Thread

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

UNS threads use special combinations of nominal diameter and thread pitch that fall outside the standard UNC, UNF and UNEF series. They are commonly specified for specialist machinery, precision components and engineering applications requiring non-standard Unified thread sizes.

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

Key Features

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

• UNS Thread Form – Designed for Unified National Special 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.

• Special Thread Sizes – Suitable for non-standard diameter and pitch combinations within the Unified thread system.

• 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 UNS threads on bolts and studs.

• Cleaning existing special-pitch external threads.

• Restoring worn or contaminated threads.

• General engineering and workshop maintenance.

• Automotive and machinery maintenance where UNS threads are specified.

• Maintenance of specialist threaded components.

• Applications requiring non-standard Unified thread diameter and pitch combinations.

Recommended Use

Select the correct UNS 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 UNS (Unified National Special) right-hand external threads only.

• Not interchangeable with UNC, UNF, UNEF, UNJF or metric thread forms unless the exact thread specifications match.

• Non-adjustable hexagon die nut.

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