MAYKESTAG HSS-Co5 Machine Tap G 1 BSPP Straight Fluted Whitworth Pipe Thread

Maykestag HSS-Co5 Machine Tap G 1 BSPP Straight Fluted Whitworth Pipe Thread

Professional G 1 straight-fluted machine tap manufactured from HSS-Co5 for producing parallel Whitworth pipe threads to DIN ISO 228. Features an 11 TPI thread, 55° Whitworth profile, Form B chamfer and through-hole geometry for controlled and accurate machine tapping.

The Maykestag Code 5204 is a precision machine tap designed for producing G parallel Whitworth pipe threads, commonly referred to as BSPP threads. This G 1 variant has 11 threads per inch and is manufactured from HSS-Co5 cobalt-alloyed high-speed steel for dependable cutting performance and wear resistance. The straight-fluted geometry and Form B chamfer are intended for through-hole tapping, where the open hole allows chips to clear beyond the threaded section during machining.

Product highlights

• HSS-Co5 construction: Cobalt-alloyed high-speed steel provides a combination of toughness, heat resistance and cutting-edge durability for professional machine tapping.
• G 1 BSPP thread: Produces parallel Whitworth pipe threads to DIN ISO 228.
• 11 TPI thread: Correct thread count for the G 1 size in the Code 5204 range.
• 55° Whitworth profile: Precision thread geometry for the specified G pipe-thread form.
• Straight-fluted design: Robust flute geometry suited to controlled machine tapping.
• Through-hole application: Designed for threading holes that continue completely through the workpiece.
• Form B chamfer: 3.5-5 pitch lead section provides progressive cutting engagement during tapping.
• DIN 5156 tool standard: Manufactured to the specified machine-tap standard for this tool series.
• 30.75mm core hole: Maykestag specifies a 30.75mm pre-drilled core-hole diameter for this G 1 variant.
• Defined tapping depth: Catalogue geometry indicates a thread-depth guideline of ≤1.5 × d1.

Designed for Accurate Through-Hole Pipe Threading

The Code 5204 geometry is designed specifically for machine tapping of parallel Whitworth pipe threads. The Form B chamfer provides a gradual cutting lead, while the straight-fluted construction gives the tap a strong and stable cutting section. In a through hole, the open space beyond the thread allows chips to clear from the cutting area. Correct pre-drilling, alignment, cutting speed, lubrication and machine conditions help produce accurate threads while reducing unnecessary tapping torque and tool wear.