Tap FANAR GWINTOWNIK UNC 3/8-16 DIN 371C R40 (2B) HSSE TN 800X

FANAR GWINTOWNIK UNC 3/8-16 DIN 371C R40 (2B) HSSE TN 800X is a machine tap designed for producing internal UNC 3/8-16 threads in accordance with DIN 371C dimensions and R40 tolerance for 2B fit. Manufactured from HSSE high-speed steel and finished with a titanium nitride (TiN) coating, this tap is intended for use in machine tapping operations on both ferrous and non-ferrous materials. The geometry and coating are optimized to support consistent chip evacuation and extended tool life during repetitive production threading tasks.

Advantages

The HSSE substrate provides high hardness and toughness at elevated cutting temperatures while the TiN coating reduces friction and wear, improving durability in serial machining. Conformity to DIN 371C and R40 tolerance ensures dimensional accuracy and interchangeability for 2B class internal threads. The tool’s design supports reliable chip formation and evacuation under machine tapping conditions, reducing the risk of thread damage and downtime.

Suitable for

• Machine tapping of UNC 3/8-16 internal threads in production environments
• Threading ferrous materials such as steel and stainless steel
• Threading non-ferrous materials such as aluminum and brass
• High-volume or repetitive threading operations using tapping heads or CNC machines

Key specifications

• Thread standard: UNC 3/8-16
• Dimensional standard: DIN 371C
• Tolerance/class: R40 for 2B internal threads
• Material: HSSE (high-speed steel with cobalt)
• Coating: Titanium nitride (TiN)
• Tool type: Machine tap for internal threads

How to use

Mount the tap securely in an appropriate machine tool or tapping head with correct axial alignment. Select drilling and tapping speeds and feeds appropriate to the workpiece material and the tap’s HSSE material and TiN coating; consult material-specific cutting data where available. Use suitable cutting fluid or lubricant for the material being machined to improve surface finish and tool life. Feed the tap steadily into the pre-drilled hole, allow chips to evacuate, and retract periodically if necessary to clear chips and avoid clogging.

Usage recommendations

For best results when tapping ferrous materials, use moderate cutting speeds and a reliable coolant or lubricant. When working with aluminum or other soft metals, reduce cutting speed slightly and ensure positive chip evacuation to prevent built-up edge. Inspect threads after tapping and replace the tap when wear or coating degradation is evident to maintain thread quality.