Straight flute hand tap NO3 with a 2-3xP semi-bottoming lead, for Unified National Coarse thread UNC 1/4" with 20 TPI and 2B class of fit, dimensions according to ISO 529 standard with 6.3mm shank and 5.0mm square drive, HSS with bright finish for 1.5xD through or blind hole threading in free machining and plain carbon steel and copper or copper alloys
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Coating name (Grade): | Bright |
Surface treatement: | Original surface |
Basic standard group (BSG): | ISO 529 |
Body material code (BMC): | HSS |
Brand Name: | Dormer |
Clamping width - millimeter (WSC): | 5 mm |
Connection diameter - millimeter (DCON MS): | 6.3 mm |
Hand (Cutting direction): | Right |
Flute Geometry (FDC): | straight chip flute |
Flute helix angle (FHA): | 0 ° |
Flute count (NOF): | 3 |
Overall length - millimeter (OAL): | 66 mm |
Premachined hole diameter - millimeter (PHD): | 5.1 mm |
Thread diameter size (TDZ): | 1/4 |
Thread diameter - millimeter (TD): | 6,35 mm |
Thread form type (THFT): | UNC - Unified Coarse |
Thread tolerance class (TCTR): | 2B |
Threading length - millimeter (THL): | 13 mm |
Threads per inch (TPI): | 20 |
Usable length diameter ratio? (ULDR): | 1.5 XD |
Usable Length - millimeter (LU): | 26 mm |
Ordering code ISO: | E5151/4NO3 |