Dormer EP31 1/2 – 20 HSS-E-PM Machine Tap

Spiral point machine tap with chamfer form C with a 2-3xP semi-bottoming lead, for Unified National Fine thread UNF 1/2in with 20 TPI and 2B class of fit, dimensions according to DIN 2184-1 standard with 9.0mm shank and 7.0mm square drive, powder metallurgical HSS-E with uncoated surface finish for 2.5xD through hole threading in general purpose applications.

Brand :Dormer

Manufacturer Part Number :EP311/2

Size (in) :1/2 – 20

Features & Benefits : EP31 series
Uncoated (steam oxide) surface treatment
Unified fine thread
Meets DIN 2184-1 – tap standard
2B internal inch thread medium class of fit
Through hole application
2.5 x D usable tool depth to diameter ratio
High speed cobalt powder metal tool material
Semi-bottoming tap chamfer (2-3 pitch lead)
Spiral point geometry
Right hand rotation/cutting

Diameter (in) :1/2

Diameter (mm) :1/2

Thread Size x Pitch :1/2 – 20

Drill Diameter (mm) :11.5

Overall Length (in) :4.3307

Overall Length (mm) :110

Flute Length (mm) :23

Flute Type :Spiral Point

Type :Machine Tap

Square Size (mm) :7.0

Application :Various

Pitch :20

Pitch (mm) :20

DIN :DIN 371/376

Threads Per Inch :20

Number of Flutes :3

Thread Type :UNF

Material :HSS-E-PM

Coating/Finish :Steam Tempered

Tap Drill Size (mm) :11.50

Thread Length (mm) :23.00

Thread Diameter (mm) :1/2