Dormer Dienuts are only used by hand and are hexagonal shaped for use by a spanner. Dienuts are used to reclaim damaged threads or to clean up existing threads.

Metric Coarse Dienuts

Application: For reclamation of screw threads.

Tolerance : 6g
Chamfer Lead : Two Threads
Surface treatment : Bright
Material : HSS - High Speed Steel

BS1127:1950