There are several reasons to use a stem extender:
BROKEN STEM/TOO SHORT: If you still have your original stem but it is broken and too short to use with your crown, you can buy a stem extender to lengthen the original broken watch stem to extend to the correct length that you need for your repair.
POCKET WATCH STEM: If you have a pocket watch stem that has broken off and there is not a pocket watch stem available in a replacement, you can use a watch stem extender to lengthen the stem to fit into the pocket watch.
CHANGE TAP SIZE: You can use an extender that will change the tap (thread) size from a larger or smaller size to a standard tap (thread) size.
REGULAR STEM TO MALE OR FEMALE STEM: Change a regular stem into a male or female stem to fit a one piece case.
- Inner tap size: original stem diameter Outer tap size: new stem diameter where the crown will attach
- Sold individually.
- Choose the stem that you would like from the drop down menu above.
*Sizes are approximate as measurements may vary slightly by gauge.
| Part # |
Inner Tap |
Outer Tap |
Type |
Part # |
Tap |
Type |
|
| 88.236 |
Tap 10 (.90mm) |
Tap 10 (.90mm) |
Standard Extender - Hub Length 2.5mm |
88.128 |
Tap 10 (.90mm) |
Female Threaded Post |
Hub Length 2.3mm |
| 88.236-L |
Tap 10 (.90mm) |
Tap 10 (.90mm) |
Standard Extender - Hub Length 3.9mm |
88.129 |
Tap 10 (.90mm) |
Female Threaded Post |
Hub Length 3.5mm |
| 88.255 |
Tap 9 (1.00mm) |
Tap 9 (1.00mm) |
Standard Extender |
88.621 |
Tap 11 (.80mm) |
Female Threaded Post |
Hub Length 2.4mm |
| 88.263 |
Tap 8 (1.10mm) |
Tap 8 (1.10mm) |
Standard Extender |
88.627 |
Tap 6 (1.30mm) |
Female Threaded Post |
Hub Length 2.3mm |
| 88.267 |
Tap 7 (1.20mm) |
Tap 7 (1.20mm) |
Standard Extender |
88.628 |
Tap 8 (1.10mm) |
Female Threaded Post |
No Longer Available |
| 88.579 |
Tap 11 (.80mm) |
Tap 11 (.80mm) |
Standard Extender |
88.639 |
Tap 9 (1.00mm) |
Female Threaded Post |
Hub Length 2.3mm |
| 88.582 |
Tap 12 (.70mm) |
Tap 12 (.70mm) |
Standard Extender |
|
|
|
|
| 88.593 |
Tap 13 (.60mm) |
Tap 13 (.60mm) |
Standard Extender |
88.180 |
Tap 10 (.90mm) |
Male Threaded Post |
Hub Length w/ Male Tip 1.7mm |
| 88.594 |
Tap 14 (.50mm) |
Tap 14 (.50mm) |
Standard Extender |
|
|
|
|
| 88.595 |
Tap 5 (1.40mm) |
Tap 5 (1.40mm) |
Standard Extender |
88.623 |
Tap 10 (.90mm) |
Male Adaptor |
O/A Length 3.75mm |
| 88.596 |
Tap 6 (1.30mm) |
Tap 6 (1.30mm) |
Standard Extender |
88.623.1 |
Tap 10 (.90mm) |
Male Adaptor |
O/A Length 2.8mm |
| 88.600 |
Tap 11 (.80mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
88.623.2 |
Tap 10 (.90mm) |
Male Adaptor |
O/A Length 3.1mm |
| 88.601 |
Tap 10 (.90mm) |
Tap 11 (.80mm) |
Extender to Change Tap Size |
88.623.3 |
Tap 10 (.90mm) |
Male Adaptor |
O/A Length 4.0mm |
| 88.602 |
Tap 10 (.90mm) |
Tap 12 (.70mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.603 |
Tap 10 (.90mm) |
Tap 13 (.60mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.607 |
Tap 10 (.90mm) |
Tap 7 (1.20mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.608 |
Tap 10 (.90mm) |
Tap 8 (1.10mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.609 |
Tap 10 (.90mm) |
Tap 9 (1.00mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.612 |
Tap 12 (.70mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.613 |
Tap 13 (.60mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.614 |
Tap 14 (.50mm) |
Tap 12 (.70mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.615 |
Tap 5 (1.40mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.616 |
Tap 6 (1.30mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.617 |
Tap 7 (1.20mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.618 |
Tap 8 (1.10mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
|
|
|
|
| 88.619 |
Tap 9 (1.0mm) |
Tap 10 (.90mm) |
Extender to Change Tap Size |
|
|
|
|
