External Crescent Rings
 
Crossover Chart
Anderton
N1800
IRR
2000
Rotor Clip
C
Military
16632
 
Housing Diameter Free Diameter Thickness
1.000
.887
.042
1.125
.997
.050
.125
.102
.015
1.250
1.110
.050
1.375
1.220
.050
.156
.131
.015
1.500
1.331
.050
1.750
1.555
.062
.188
.161
.015
2.000
1.777
.062
.219
.187
.025
.236
.203
.025
.250
.211
.025
.281
.242
.025
.312
.270
.025
.375
.328
.025
.406
.359
.025
.438
.386
.025
.500
.441
.035
.562
.497
.035
.625
.553
.035
.688
.608
.042
.750
.665
.042
.812
.721
.042
.875
.777
.042
.938
.830
.042