#4 - 0.66 BA HSS Blue Merlin® Spiral Flute Machine Tap CT80404

HSS

For general purpose applications

Helix angle of 30° - 35° degrees depending on size

BSW (British Standard Whitworth) is similar to UNC but differs in that the thread form for a BSW is 55° vs. the 60° for UNC

BSF (British Standard Fine) is a finer pitch series, also with a 55° degree thread form

BA (British Association) is a metric thread system devised by the British for small screws used in components with a thread form of 47 ½°

Spiral flute taps are designed for blind hole applications and lift chips out of the hole

Suitable for various steels (up to 28Rc) and some stainless steel

Ferrous oxide surface treatment increases wear resistance, improves chip flow and reduces chip welding

The ferrous oxide surface treatment also enables the tap to absorb the lubricant / cutting fluid applications and lift chips out of the hole

Clarkson Osborn Catalog

Size #4 - 0.66 BA

Flute length 17mm

Overall length 50mm

Package quantity/sold as each 1

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