Hex Nut - Inch Thread - SW 17 - Per Piece.

locknut with 17mm wrench size
For axles with 3/8" (9.5mm), 26tpi threading
Made in Japan

Bicycle parts, bicycle spare parts, Single Speed / Fixed Gear, Hub Accessories;

Shimano Europe B.V.
High Tech Campus 92
5656 AG, Eindhoven
The Netherlands
https://bike.shimano.com/de-DE/home.html