ETS 外螺纹螺帽 为了配合ETS和ETA 筒夹锁到内螺纹刀柄上，减小占用空间和降低振动至最少。
ETS External Thread Nut
This version has been developed in order to enable the application of ETS and ETA collets to tool holders with inner thread, thus reducing the required space and vibrations to a minimum.
(Dimensions are in mm)
| TYPE | B | C | D | S | Used on Collet | Reference Number |
| ETS 16 | 12.00 | M24 x 1.00 | 7.00 | 21 | ETS 16 / ETA 16 | 5016.0000 |
| ETS 20 | 13.00 | M28 x 1.50 | 8.00 | 25 | ETS 20 | 5020.0000 |
| ETS 25 | 14.00 | M32 x 1.50 | 9.00 | 27 | ETS 25 | 5025.0000 |
| ETS 32 | 15.00 | M40 x 1.50 | 10.00 | 35 | ETS 32 | 5032.0000 |
| Reference Number 例如： ETS16 M24x1.00(5016.0000) |
