Thread Tap FANAR NARZYNKA UNF 1/4-28 DIN-22568 (2A) HSS 800

FANAR NARZYNKA UNF 1/4-28 DIN-22568 (2A) HSS 800 is a high-speed steel plug/hand tap designed to cut UNF 1/4-28 threads to DIN 22568 with 2A tolerance. Made for manual or machine tapping, this HSS tool is intended for producing and repairing UNF threaded holes in materials compatible with high-speed steel cutting tools. The design supports accurate thread geometry and consistent thread form during maintenance, repair and production operations.

Advantages

The tap is manufactured from HSS 800 grade steel to provide a balance of hardness and toughness for general-purpose threading. It conforms to DIN 22568 thread form and 2A tolerance to ensure interchangeability and reliable fit with mating fasteners. Its plug/hand tap design offers versatility for both hand-held tapping and machine use, enabling controlled cutting performance and stable thread quality.

Suitable for

• Cutting UNF 1/4-28 threads in through or blind holes where DIN 22568 form is required
• Maintenance and repair of UNF-threaded components
• Small batch production of UNF threaded parts using manual or machine tapping
• Tapping common metals compatible with HSS tooling, such as steels and non-ferrous alloys

Key specifications

• Thread standard: UNF (Unified National Fine) 1/4-28
• Thread form: DIN 22568
• Tolerance class: 2A (external/internal mating fit)
• Tool type: plug/hand tap suitable for manual and machine use
• Material: high-speed steel (HSS 800)
• Intended application: cutting/repairing internal threads

How to use

Select an appropriately sized pilot hole according to standard tapping charts for UNF 1/4-28 and secure the workpiece. For hand tapping, use a suitable tap wrench and apply steady axial pressure while rotating the tap clockwise to cut. Periodically reverse slightly to break chips and clear the flutes. For machine tapping, set proper spindle speed and feed to match material and tap type, and ensure correct alignment to avoid walk-off. Use cutting fluid appropriate for the workpiece material to extend tool life and improve surface finish.

Usage recommendations

Use this HSS plug/hand tap for general-purpose threading of materials compatible with high-speed steel. Match pilot hole diameter and tapping speed to the material. For hardened or abrasive materials consider using coated or higher-grade tooling. Regularly clean flutes and inspect the cutting edges to maintain thread quality and tool life.