Dormer E2871/4 7174109 UNC machine forming tap, 1/4" x 20 thread, 5-flute, Cobalt High Speed Steel (HSS-E), DIN 2184-1. Oil grooves for efficient lubrication. Suitable for M - Stainless steel, N - Non-ferrous metals, P - Steel and cast steel. 80mm overall length, 5.8mm pre-drill hole diameter.

Basic Standard

DIN 2184-1

Clamping Length - millimeter (LSC)

8

Clamping width - inch

0.2165

Clamping width - millimeter (WSC)

5.5

Coating

TiN

Coating property (CTP)

1

Connection diameter - inch (DCON MS)

0.2756

Connection diameter - millimeter (DCON MS)

7

EDP number

47174109

Flute count (NOF)

5

Flute Geometry (FDC)

Oil Grooves Geometry (Threadforming)

Hand (Cutting direction)

Right

Material

HSS-E

Material application

M - Stainless steel, N - Non-ferrous metals, P - Steel and cast steel

MID number

7174109

Ordering code ANSI

E2871/4

Overall length - inch (OAL)

3.1496

Overall length - millimeter (OAL)

80

Premachined hole diameter - inch (PHD)

0.2283

Premachined hole diameter - millimeter (PHD)

5.8

Shank

Cylindrical shank with Square

Tap chamfer style (TCS)

C 2 - 3.5

Thread diameter - inch (TD)

0.25

Thread diameter - millimeter (TD)

6.35

Thread diameter size (TDZ)

1/4

Thread form (THFT)

UNC - Unified Coarse

Threading length - inch (THL)

0.5906

Threading length - millimeter (THL)

15

Threads per inch (TPI)

20

Usable length (ULDR)

3.5

Usable Length - inch (LU)

1.1811

Usable Length - millimeter (LU)

30