Crescent Nicholson CTFTR1RBG No. 1 regular inch thread restoring file
Check compatibility
Crescent Nicholson Type 1 includes 11, 12, 13, 14, 16, 18, 20 and 24 TPI. Choose it when the bolt pitch appears in that list and compare Type 2 for 27, 28 or 32 TPI.
Questions before ordering
Which Crescent file has a 28-TPI face?
Crescent lists 28 TPI on Type 2. Type 1 includes the regular inch pitches through 24 TPI, with gaps between the marked sizes.