TWH-NRH Range - Imperial

The TWH-NRH range of imperial hexagon ratchet heads, suitable for use with TWH-N series low profile hydraulic torque wrenches, provide exceptional flexibility with across flats (AF) sizes from 1 1/16” to 6 7/8” available as standard. All models feature extremely low profile design combined with a minimum nose radius (R) that enables fitment in very confined limited access places. For even greater versatility a comprehensive range of imperial hexagon reducer bushes and square drive conversion kits to suit TWH-NRH imperial ratchet heads are also available. Non standard and special design ratchet heads can be made to order.

  • Choice of standard imperial sizes
  • Easily fitted to TWH-N drive units
  • Strong steel construction

Hydraulic torque wrenches. Female hexagon imperial size ratchet heads.
Bolt Size Nut AF Size For TWH27N For TWH54N For TWH120N For TWH210N For TWH430N
Model Number R mm Wt kg Model Number R mm Wt kg Model Number R mm Wt kg Model Number R mm Wt kg Model Number R mm Wt kg
5/8" 1 1/16" TWH27NRH1.1/16 10.4 1.5                        
3/4" 1 1/4" TWH27NRH1.1/4 9.7 1.6                        
7/8" 1 7/16" TWH27NRH1.7/16 9.8 1.6 TWH54NRH1.7/16 13.5 2.9                  
1" 1 5/8" TWH27NRH1.5/8 10.0 1.6 TWH54NRH1.5/8 10.8 2.8                  
1 1/8" 1 13/16" TWH27NRH1.13/16 10.5 1.7 TWH54NRH1.13/16 10.7 2.9                  
1 1/4" 2" TWH27NRH2 10.5 1.7 TWH54NRH2 11.7 3.0                  
1 3/8" 2 3/16" TWH27NRH2.3/16 10.3 1.8 TWH54NRH2.3/16 11.8 3.1 TWH120NRH2.3/16 14.7 6.1            
1 1/2" 2 3/8" TWH27NRH2.3/8 10.5 1.8 TWH54NRH2.3/8 11.8 3.2 TWH120NRH2.3/8 14.8 6.4            
1 5/8" 2 9/16"       TWH54NRH2.9/16 11.6 3.3 TWH120NRH2.9/16 14.8 6.4            
1 3/4" 2 3/4"       TWH54NRH2.3/4 11.8 3.4 TWH120NRH2.3/4 14.9 6.5 TWH210NRH2.3/4 18.3 12.1      
1 7/8" 2 15/16"       TWH54NRH2.15/16 14.8 3.5 TWH120NRH2.15/16 14.9 6.5 TWH210NRH2.15/16 18.3 12.2      
2" 3 1/8"       TWH54NRH3.1/8 12.1 3.5 TWH120NRH3.1/8 15.1 6.5 TWH210NRH3.1/8 18.5 12.3 TWH430NRH3.1/8 26.0 23.2
2 1/4" 3 1/2"             TWH120NRH3.1/2 16.9 7.9 TWH210NRH3.1/2 19.3 12.4 TWH430NRH3.1/2 26.8 23.9
2 1/2" 3 7/8"             TWH120NRH3.7/8 19.6 8.5 TWH210NRH3.7/8 19.5 12.5 TWH430NRH3.7/8 26.5 25.7
2 3/4" 4 1/4"                   TWH210NRH4.1/4 19.5 13.3 TWH430NRH4.1/4 26.9 26.1
3" 4 5/8"                   TWH210NRH4.5/8 19.3 13.8 TWH430NRH4.5/8 25.9 26.3
3 1/4" 5"                         TWH430NRH5 27.4 27.9
3 1/2" 5 3/8"                         TWH430NRH5.3/8 25.8 28.3
3 3/4" 5 3/4"                         TWH430NRH5.3/4 24.8 29.3
4" 6 1/8"                         TWH430NRH6.1/8 25.0 30.1
4 1/4" 6 1/2"                         TWH430NRH6.1/2 25.0 31.0
4 1/2" 6 7/8"                         TWH430NRH6.7/8 27.3 31.8