ETS螺帽 是刀柄和ETS/ETA筒夹锁紧必要的部件，它用尽可能小的尺寸为精密切削提供高的刚性。
ETS Nut
Essential for ensuring correct coupling between ETS and ETA
collets and the collet holder; with its reduced size, this nut
allows to work as closely as possible to the work piece providing high rigidity for precision cutting.
(Dimensions are in mm)
| TYPE | ØA | B | C | WS | D | Used on Collet | Reference Number |
| ETS 6 ETS 6.1 | 14.00 10.50 | 8.00 8.00 | M10 x 0.50 M8 x 0.50 | 13 9 | 6.00 6.00 | ETA 6 | 2006.0000 2006.1000 |
| ETS 8 ETS 8.1 | 18.00 12.50 | 8.00 8.00 | M14 x 1.00 M10 x 0.75 | 17 11 | 6.00 6.00 | ETA 8 | 2008.0000 2008.1000 |
| ETS 9 ETS 9.1 | 13.50 15.00 | 8.00 8.00 | M10 x 0.75 M11 x 0.75 | 12 13 | 6.00 6.00 | ETS 9 | 2009.0000 2009.1000 |
| ETS 10 ETS 10.1 | 18.00 15.00 | 8.00 8.00 | M14 x 1.00 M12 x 0.75 | 17 13 | 6.00 6.00 | ETA 10 / ETS 10 | 2010.0000 2010.1000 |
| ETS 12 ETS 12.1 ETS 12.6 ETS 12.7 | 19.00 18.00 25.00 25.00 | 12.00 12.00 12.50 12.50 | M14 x 0.75 M13 x 0.75 M18 x 1.50 M14 X 0.75 | 17 16 22 17 | 9.00 9.00 10.00 10.00 | ETA 12 / ETS 12 | 2012.0000 2012.1000 2012.6000 2012.7000 |
| ETS 16.1 ETS 16.2 ETS 16.3 ETS 16.4 | 26.50 24.70 26.70 30.00 | 15.00 15.00 15.00 12.00 | M22 x 1.50 M19 x 1.00 M20 x 1.00 M22 x 1.50 | 25 22 24 26 | 11.00 11.00 11.00 9.00 | ETA 16 / ETS 16 | 2016.1000 2016.2000 2016.3000 2016.4000 |
| ETS 20.1 ETS 20.2 | 32.00 32.00 | 16.50 16.50 | M24 x 1.00 M25 x 1.50 | 28 28 | 12.00 12.00 | ETS 20 | 2020.1000 2020.2000 |
| Reference Number 例如： ETS16 M22x1.50 (2016.1000) |
