Dormer 1/2 – 20UNF HSS-E-PM Machine Tap – E033

Spiral flute machine tap with chamfer form C with a 2 – 3 x P semi-bottoming lead, for Unified National Fine thread UNF 1/2in with 20 TPI and 2B class of fit, dimensions according to ISO 529 standard with 9mm shank and 7.1mm square drive, powder metallurgical HSS-E with uncoated surface finish and 45 helix angle for 2.5 x D blind hole threading in general purpose applications.

Brand :Dormer

Manufacturer Part Number :E0331/2

Size (in) :1/2 – 20

Features & Benefits : E033 series
Thread form, unified fine
Meets ISO 529 standards
Internal inch thread medium class of fit
Blind hole application
2.5 x D usable tool depth to diameter ratio
Semi-bottoming tap chamfer (2-3 pitch lead)
Spiral flute geometry
45 helix angle (flute)
Right hand rotation/cutting

Diameter (in) :1/2

Diameter (mm) :12.7

Thread Size x Pitch :1/2 – 20

Drill Diameter (mm) :11.50

Overall Length (in) :3.5039

Overall Length (mm) :89

Flute Length (mm) :22

Flute Type :Spiral Flute

Type :Machine Tap

Square Size (mm) :7.10

Application :Various

Pitch :20

Teeth per Inch :20

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) :22.00

Thread Diameter (in) :1/2