Dormer E6511/4 5978353 machine tap with 1/4" x 20 UNC thread, spiral flute 30° helix, 2 flutes, HSS. DORMER DIN standard for steel and cast steel applications. Pre-drill hole diameter 5.1 mm.

Basic Standard

DORMER DIN

Clamping width - inch

0.1969

Clamping width - millimeter (WSC)

6.3

Coating

Steam Tempered

Coating property (CTP)

2

Connection diameter - inch (DCON MS)

0.248

Connection diameter - millimeter (DCON MS)

83

Coolant supply property (CSP)

5

EDP number

273227

Flute count (NOF)

30

Flute Geometry (FDC)

Spiral Flute Geometry

Flute helix angle (FHA)

30

Hand (Cutting direction)

Right

Material

HSS

Material application

P - Steel and cast steel

MID number

5978353

Ordering code ANSI

E6511/4

Overall length - inch (OAL)

3.2677

Overall length - millimeter (OAL)

83

Premachined hole diameter - millimeter (PHD)

5.1

Shank

Cylindrical shank with Square

Tap chamfer style (TCS)

C 2 - 3

Thread diameter - inch (TD)

0.2008

Thread diameter - millimeter (TD)

5.1

Thread diameter size (TDZ)

1/4

Thread form (THFT)

UNC - Unified Coarse

Threading length - inch (THL)

0.6693

Threading length - millimeter (THL)

17

Threads per inch (TPI)

20

Usable length (ULDR)

1.5