Bilz 21100030 WE1 M4 Quick Change Tap Adapter NOS 6711253 DIN-371.  Size 1.  There are 4 available, 1 Per Order.  New unused condition in original packaging.  Please confirm this adapter meets your desired application prior to purchasing.  Details listed below.  Item is sold as is with No Returns.  Will be shipped via USPS 1st Class.  MSC Direct has this listed retail $44.42.

WE1 M4 DIN-371d3=4.53.4d=30d1=19d2=19M4l1=17l3=4l4=21.5l5=7Series=1211000306711253

Specs

Tap Size (mm)M4
Adapter Size1
Tap Shank Diameter (mm)4.50
Tap Shank Diameter (Decimal Inch)0.1770
Tap Square Size (mm)3.40
Tap Square Size (Decimal Inch)0.1340
Quick ChangeYes
Projection (mm)7.00
Projection (Decimal Inch)0.2756
Tap Depth (mm)16.99
Tap Depth (Decimal Inch)0.6690
SeriesWE 1
Overall Length (mm)28.50
Overall Length (Decimal Inch)1.1221
Flange Diameter (mm)30.00
Flange Diameter (Decimal Inch)1.1810
Outside Shank Diameter (mm)19.00
Outside Shank Diameter (Decimal Inch)0.7480
Through CoolantYes
DIN StandardDIN 371
PSC Code5136