Tap FANAR GWINTOWNIK UNC 3/4-10 DIN 376B (2B) HSSE 800

FANAR GWINTOWNIK UNC 3/4-10 DIN 376B (2B) HSSE 800 is a UNC thread tap designed to cut internal 3/4-10 threads to DIN 376B with a 2B tolerance. Manufactured from HSSE 800 high-speed steel, this tap provides the hardness and wear resistance required for repeated tapping operations in compatible metals and alloys. The geometry and flute design are intended for reliable chip evacuation in standard through-hole and blind-hole tapping when used with appropriate tapping parameters and lubricants.

Advantages

The HSSE 800 material composition offers elevated hot hardness and improved wear resistance compared with conventional high-speed steels, supporting extended tool life in production and workshop environments. Conformance to DIN 376B and the UNC 3/4-10 thread form ensures interchangeability with standardized fasteners. The tap’s dimensional tolerance class 2B provides a balance between fit accuracy and manufacturing ease for general-purpose internal threads.

Suitable for

• Cutting internal UNC 3/4-10 threads in through-holes and blind holes
• Manual tapping and machine tapping (dependent on machine setup and speeds)
• Workshop repairs, maintenance, and small-batch production of assemblies using UNC fasteners

Key specifications

• Thread form: UNC (Unified National Coarse)
• Thread size and pitch: 3/4-10 (3/4 inch nominal diameter with 10 threads per inch)
• Tolerance class: 2B (internal thread tolerance)
• Material: HSSE 800 high-speed steel (high hot hardness and wear resistance)
• Standard: DIN 376B thread tap geometry
• Application: Cutting internal threads in compatible metals and alloys

How to use

Select the correct drill size and verify hole depth before tapping. Secure the workpiece and, for machine tapping, set appropriate spindle speed and feed for the material being machined. Apply a suitable cutting fluid to reduce friction and aid chip removal. For manual tapping, use a tap wrench and maintain axial alignment; turn the tap forward several turns then back off about a quarter turn to break chips. For machine tapping, ensure the machine provides proper feed or use a floating tap holder to accommodate axial misalignment. Clean chips from the flutes periodically and inspect the tap for wear or damage before continued use.

Usage recommendations

Use recommended drill sizes and cutting parameters for the specific workpiece material. Employ appropriate cutting fluid and chip evacuation practices when tapping ductile or gummy materials. Replace the tap when wear or chipping reduces thread quality to maintain consistent 2B internal thread fit.