Common models of tool holder nuts include:
ER-A type: [ER11A, ER16A, ER20A],
ER-M type: [ER8M, ER11M, ER16M],
ER-UM type: [ER25UM, ER32UM, ER40UM, ER50UM],

GER: [GER16, GER20, GER25, GER32],

GSK, and SK high-speed tool holder nuts.
The ER type is used for ER tool holders,
SK for SK tool holders, and GER for GER high-speed tool holders.

Tool holder nuts are made from high-quality chromium-molybdenum steel,
with a hardness of HRC 46-52° and precision within 0.005 mm.
After rough turning and quenching, the threads are precision-turned, with surface rust prevention treatment,
resulting in an elegant appearance and long-lasting durability.
The collimation and precision of the nut are high, meeting the higher requirements of processed products.
This improves machine tool processing accuracy and tool service life.
High precision, excellent wear resistance, stable performance, reasonable pricing.
Factory direct sales—orders are welcome!