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N1408 - Imperial Balanced Lug - For Shafts - MIL-R-21248/MS 16626
Reference Number Nominal Diameter (d1) Fraction Circlip Dimensions Groove Dimensions Supplementary Data
Thickness (s) Tolerance Unstressed Diameter (d3) Beam (b)≈ Lug Hole (d5) min Groove Diameter (d2) Tolerance Groove Width (m) Tolerance Radial Depth of Groove (t) Min Shoulder Length (n) Lb.f (FN) lb.f (FR)

Note all values
are imperial

Manufacturer's Choice

Unstressed

 N1408-0050 0.500   1/2 0.035 ± 0.002 0.461 0.080 0.040 0.468 ± 0.002 0.039 + 0.003   0.016 0.050 226 1,240
N1408-0056 0.562   9/16 0.035 ± 0.002 0.521 0.088 0.040 0.530 ± 0.002 0.039 + 0.003   0.016 0.050 254 1,390
N1408-0059 0.594  19/32 0.035 ± 0.002 0.550 0.092 0.040 0.559 ± 0.003 0.039 + 0.003   0.017 0.050 294 1,470
N1408-0062 0.625   5/8 0.035 ± 0.002 0.579 0.096 0.040 0.588 ± 0.003 0.039 + 0.003   0.018 0.055 327 1,550
N1408-0068 0.688  11/16 0.042 ± 0.002 0.635 0.104 0.040 0.646 ± 0.003 0.046 + 0.003   0.021 0.065 409 2,040
N1408-0075 0.750   3/4 0.042 ± 0.002 0.693 0.112 0.040 0.704 ± 0.003 0.046 + 0.003   0.023 0.070 488 2,230
N1408-0078 0.781  25/32 0.042 ± 0.002 0.722 0.116 0.040 0.733 ± 0.003 0.046 + 0.003   0.024 0.075 530 2,320
N1408-0081 0.812  13/16 0.042 ± 0.002 0.751 0.120 0.048 0.762 ± 0.003 0.046 + 0.003   0.025 0.075 574 2,410
N1408-0087 0.875   7/8 0.042 ± 0.002 0.810 0.128 0.048 0.812 ± 0.003 0.046 + 0.003   0.027 0.080 668 2,600
N1408-0093 0.938  15/16 0.042 ± 0.002 0.867 0.136 0.048 0.882 ± 0.003 0.046 + 0.003   0.028 0.085 743 2,780
N1408-0100 1.000 1       0.042 ± 0.002 0.925 0.144 0.048 0.940 ± 0.003 0.046 + 0.003   0.030 0.090 848 2,970
N1408-0106 1.062 1   1/16 0.050 ± 0.002 0.982 0.147 0.076 0.998 ± 0.004 0.056 + 0.004   0.032 0.096 961 3,750
N1408-0112 1.125 1   1/8 0.050 ± 0.002 1.041 0.150 0.076 1.059 ± 0.004 0.056 + 0.004   0.033 0.100 1,050 3,980
N1408-0118 1.188 1   3/16 0.050 ± 0.002 1.098 0.153 0.076 1.118 ± 0.004 0.056 + 0.004   0.035 0.105 1,180 4,200
N1408-0125 1.250 1   1/4 0.050 ± 0.002 1.156 0.157 0.076 1.176 ± 0.004 0.056 + 0.004   0.037 0.110 1,310 4,420
N1408-0131 1.312 1   5/16 0.050 ± 0.002 1.214 0.161 0.076 1.232 ± 0.004 0.056 + 0.004   0.040 0.120 1,480 4,640
N1408-0137 1.375 1   3/8 0.050 ± 0.002 1.272 0.165 0.076 1.291 ± 0.004 0.056 + 0.004   0.042 0.125 1,630 4,860
N1408-0143 1.438 1   7/16 0.050 ± 0.002 1.333 0.169 0.076 1.350 ± 0.004 0.056 + 0.004   0.044 0.130 1,790 5,080
N1408-0150 1.500 1   1/2 0.050 ± 0.002 1.387 0.173 0.076 1.406 ± 0.004 0.056 + 0.004   0.047 0.140 1,990 5,940
FN = Load Bearing Capacity Groove lb.f
FR = Load Bearing Capacity Circlip With Sharp Corner Abutment lb.f  
 
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