Eaton Snap Rings > Internal Eaton Style Rings

Internal Retaining Ring (NAN)

Internal Eaton Style Rings: Internal Retaining Ring (NAN)

See our Internal Retaining Ring Chart below, which includes technical specifications such as:

  • Internal Retaining Ring Dimensions
  • Internal Retaining Ring Groove Dimensions
  • Internal Retaining Ring Thrust Load
  • Plus More

You’ll also notice CAD drawings below to further assist you.

For more information, view all Eaton Rings, or feel free to download our internal retaining ring PDF or view our complete retaining ring catalog. If you do not see your desired specifications in our size chart below, you can custom-design your own bearing snap ring right on our website!

Ring Specifications
Metric Retaining Ring METRIC, Internal Light Duty Retaining Ring ND, & Internal Retaining Ring NAN

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Specifications

Catalog Stock Sizes Available: 0.375″ to 2.688″ & 2.717″ to 10.000″
Custom Sizes Obtainable: 0.050″ to 60″
Standard Material: Carbon Spring Steel

Internal Retaining Ring (NAN) Technical Drawing
Rt Number Housing Ring Groove Free Gap Ring Thrust
Capacity LBS.
Diameter S Free Diameter Wire Section Dia. Width
A		 Nom. Depth B Min. Max.
Frac. inch Dec. inch mm D
inches		 Tol. inches W
±.005		 T
±.002		 C Tol.
NAN37 3/8 0.375 9.53 0.400 +0.020 0.035 0.025 0.395 0.028 0.010 0.125 0.218 250
NAN43 7/16 0.438 11.12 0.467 -0.000 ±.003 0.462 +.003
-.000		 300
NAN50 1/2 0.500 12.70 0.530 0.040 0.524 0.012 470
NAN51 – 0.512 13.00 0.542 ±.003 0.536 480
NAN56 9/16 0.562 14.27 0.600 0.035 0.590 0.039 0.014 510
NAN62 5/8 0.625 15.88 0.670 +0.025 0.048 0.657 +0.003 0.016 0.187 0.344 620
NAN68 11/16 0.688 17.48 0.733 -0.000 ±.003 0.720 ±.003 -0.000 700
NAN75 3/4 0.750 19.05 0.799 0.786 0.018 750
NAN77 – 0.777 19.74 0.827 0.062 0.813 1,020
NAN81 13/16 0.812 20.62 0.867 ±.003 0.852 0.020 1,090
NAN87 7/8 0.875 22.23 0.934 0.919 0.046 0.022 1,130
NAN90 – 0.901 22.88 0.961 0.078 0.042 0.945 +0.003 1,260
NAN93 15/16 0.938 23.82 1.003 ±.003 0.986 -0.000 0.024 0.281 0.438 1,360
NAN100 1 1.000 25.40 1.070 1.052 1,470
NAN102 – 1.023 25.98 1.094 1.075 0.026 1,500
NAN106 11/16 1.062 26.97 1.134 0.093 1.114 1,780
NAN112 11/8 1.125 28.58 1.202 +0.031 ±.003 1.181 0.028 1,880
NAN118 13/16 1.188 30.17 1.270 -0.000 1.248 0.030 1,990
NAN125 11/4 1.250 31.75 1.337 0.109 1.314 0.056 0.032 2,090
NAN131 15/16 1.312 33.32 1.404 ±.003 0.050 1.380 +0.003 0.034 0.375 0.562 2,200
NAN137 13/8 1.375 34.93 1.472 1.447 -0.000 0.036 2,300
NAN143 17/16 1.438 36.52 1.535 1.510 2,460
NAN145 – 1.456 36.08 1.557 0.125 1.532 0.038 2,490
NAN150 11/2 1.500 38.10 1.607 ±.005 1.576 ±.005 2,560
NAN156 19/16 1.562 39.67 1.668 1.642 0.040 3,060
NAN162 15/8 1.625 41.28 1.736 0.141 1.709 0.042 3,190
NAN165 – 1.653 41.99 1.765 ±.005 1.737 3,240
NAN168 111/16 1.688 42.87 1.804 1.776 0.044 0.437 0.687 3,370
NAN175 13/4 1.750 44.45 1.870 1.842 0.068 0.046 3,510
NAN181 113/16 1.812 46.02 1.933 0.062 1.904 +0.004 3,640
NAN185 – 1.850 47.00 1.975 1.946 -0.000 0.048 3,710
NAN187 17/8 1.875 47.63 2.000 0.156 1.971 3,760
NAN193 115/16 1.938 49.22 2.068 ±.005 2.038 3,870
NAN196 131/32 1.968 49.99 2.098 2.068 0.050 3,935
NAN200 2 2.000 50.80 2.131 0.046 2.100 4,000
NAN206 21/16 2.062 52.37 2.197 0.000 2.166 0.052 4,380
NAN212 21/8 2.125 53.98 2.260 2.229 5,140
NAN218 23/16 2.188 55.55 2.331 2.296 0.054 0.500 0.750 5,470
NAN225 21/4 2.250 57.15 2.393 0.171 2.358 0.086 5,630
NAN231 25/16 2.312 58.72 2.459 ±.005 0.078 2.424 +0.005 0.056 5,790
NAN237 23/8 2.375 60.33 2.523 2.487 ±.006 -0.000 5,950
NAN244 – 2.440 61.98 2.592 2.556 0.058 6,270
NAN250 21/2 2.500 63.50 2.653 2.616 6,350
NAN253 217/32 2.531 64.28 2.688 0.187 2.651 0.060 6,510
NAN256 29/16 2.562 65.07 2.726 ±.005 2.686 0.103 8,400
NAN262 25/8 2.625 66.67 2.790 0.093 2.750 +0.005 0.062 0.562 0.812 8,650
NAN268 211/16 2.688 68.27 2.856 2.816 -0.000 8,800
NAN271 – 2.717 68.83 2.882 +.046
-.000		 2.842 0.064 0.562 0.812 8,875
NAN275 23/4 2.750 69.85 2.918 2.878 0.103 8,950
NAN281 213/16 2.813 71.45 2.985 0.187 0.093 2.945 +0.005 0.066 9,100
NAN283 – 2.834 72.00 3.006 2.966 -0.000 9,250
NAN287 27/8 2.875 73.00 3.056 3.011 0.068 9,400
NAN300 3 3.000 76.20 3.181 +0.062 3.136 0.625 0.875 9,550
NAN306 33/16 3.062 77.78 3.247 -0.000 3.202 10,470
NAN312 31/8 3.125 79.38 3.311 3.265 0.070 10,690
NAN315 35/32 3.156 80.16 3.342 0.218 3.296 10,800
NAN325 31/4 3.250 82.55 3.442 3.394 11,120
NAN334 – 3.346 85.00 3.539 3.490 0.072 11,450
NAN346 315/32 3.469 88.00 3.663 3.613 11,870
NAN350 31/2 3.500 88.90 3.700 3.648 11,970
NAN354 – 3.543 90.00 3.745 3.691 ±.006 0.074 0.718 1.062 12,120
NAN356 39/16 3.562 90.47 3.766 +0.078 3.710 12,190
NAN362 35/8 3.625 92.08 3.831 -0.000 3.773 0.120 12,380
NAN375 33/4 3.750 95.25 3.962 0.109 3.902 +0.005 0.076 12,600
NAN387 37/8 3.875 98.42 4.089 4.027 -0.000 12,820
NAN393 315/16 3.938 100.00 4.156 0.250 4.094 0.078 13,230
NAN400 4 4.000 101.60 4.221 4.156 13,690
NAN412 41/8 4.125 104.77 4.355 4.285 14,110
NAN425 41/4 4.250 107.95 4.485 4.410 0.080 14,540
NAN433 – 4.330 110.00 4.565 +0.093 4.490 14,960
NAN443 47/16 4.436 112.69 4.670 -0.000 4.596 0.875 1.312 15,170
NAN450 41/2 4.500 114.30 4.744 4.664 0.082 15,390
NAN462 45/8 4.625 117.48 4.875 4.795 0.085 15,830
NAN475 43/4 4.750 120.65 5.011 0.281 4.926 0.088 16,250
NAN500 5 5.000 127.00 5.265 5.180 0.090 17,110
NAN525 51/4 5.250 133.35 5.530 5.435 0.092 20,590
NAN537 53/8 5.375 136.53 5.660 5.565 0.139 0.095 21,110
NAN550 51/2 5.500 140.00 5.796 +0.125 0.312 0.125 5.696 ±.007 +0.006 0.098 1.000 1.500 21,790
NAN575 53/4 5.750 146.05 6.050 -0.000 5.950 -0.000 0.100 22,570
NAN600 6 6.000 152.40 6.309 6.204 0.102 23,550
NAN625 61/4 6.250 158.75 6.568 6.458 0.104 29,420
NAN650 61/2 6.500 165.00 6.832 6.712 0.174 0.106 30,610
NAN662 65/8 6.625 168.27 6.975 +0.156 0.343 0.156 6.845 +0.006 1.125 1.812 31,400
NAN675 63/4 6.750 171.45 7.100 -0.000 6.970 -0.000 0.110 32,640
NAN700 7 7.000 177.80 7.350 7.220 34,850
NAN725 71/4 7.250 184.15 7.630 7.500 38,060
NAN750 71/2 7.500 190.50 7.890 0.375 7.750 0.125 1.375 2.250 39,450
NAN800 8 8.000 203.20 8.400 8.250 ±.008 41,960
NAN825 81/4 8.250 209.55 8.665 0.437 8.540 0.145 43,320
NAN850 81/2 8.500 215.90 8.915 +0.187 8.790 0.209 1.625 2.500 44,710
NAN875 83/4 8.750 222.25 9.205 -0.000 0.187 9.080 +0.006 48,900
NAN900 9 9.000 228.60 9.455 9.330 -0.000 49,740
NAN905 – 9.055 230.00 9.509 0.500 9.384 0.165 50,050
NAN950 91/2 9.500 241.30 9.955 9.830 1.750 2.625 52,520
NAN984 927/32 9.840 250.00 10.295 10.170 53,780
NAN1000 10 10.000 254.00 10.455 10.330 55,400
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