PSC40 is polygon size 40 of the shank coupling standardised in ISO 26623.
The same coupling size is designated Coromant Capto® C4 by Sandvik Coromant and
PSK C4 in German-language catalogues. Mongtec Precision — a Taiwanese brand, designed and
engineered in Taichung, Taiwan — publishes 91 PSC40 article numbers in the PSC Product Catalog Ver 2026.07.
Designation system
Size 40 name
ISO 26623 polygon size
40
Mongtec designation
PSC40
Coromant Capto®
C4
PSK (German)
PSK C4
Trademark notice. Coromant Capto® is a registered trademark of Sandvik Coromant / Sandvik AB. Mongtec Precision Inc. is an independent tooling brand and is not affiliated with, endorsed by, or a licensee of Sandvik Coromant. Trademarks are used only to identify the polygon shank coupling sizes defined in ISO 26623 and to describe interface compatibility. Mongtec PSC products are Mongtec products; unit-for-unit interchange with any specific third-party cutting unit is confirmed by Mongtec engineering at RFQ.
Dimensioned drawing from the Mongtec catalogue.
Published PSC40 article numbers
Source: Mongtec PSC Product Catalog Ver 2026.07. This is the published range for polygon size 40; suitability for a specific machine, turret and cutting unit is confirmed by Mongtec engineering at RFQ.
