ANSI and National  Standard Bushings
Head Press Fit
   
Type H All press fit bushings have lapped, honed or ground I.D.'s. 
Bushings with I.D.'s up to 1.0" are concentric to .0003" max.
T. I. R. to the O.D.  Larger sizes are concentric to .0005" T.I.R.
to the O.D. 
National bushings are not counterbored.
             A   B C     F G
      Standard ID Sizes Range in Body O.D. Length ANSI Price Head Head
Number, Letter, Or Fraction Sizes Inches Nominal (Actual) (Overall) Symbol Type "P"  Code ** Dia. Thick.
  .0135     1/4    H-10-4 238  
80, 79, 1/64, 78, 77, 76, 75, 74 to   5/32   5/16    H-10-5 240   1/4   3/32
73, 72, 71, 70 .0280 (.1578 / .1575)   3/8    H-10-6 245  
        1/2    H-10-8 246    
        1/4    H-10-4 219  
69, 68, 1/32, 67, 66, 65, 64, 63, .0292   5/32   5/16    H-10-5 221 1/4 3/32
62, 61, 60, 59, 58, 57, 56, 3/64 to (.1578 / .1575)   3/8    H-10-6 226  
  .0469   1/2    H-10-8 228  
        1/4    H-10-4 200    
  .0520   5/32   5/16    H-10-5 201 1/4 3/32
55, 54, 53, 1/16 to (.1578 / .1575)   3/8    H-10-6 204  
  .0625   1/2    H-10-8 207  
        1/4    H-12-4 145    
1/16, 52, 51, 50, 49, 48, 5/64, .0625   3/16   5/16    H-12-5 148  
47, 46, 45, 44, 43, 42, 3/32, 41, to (.1891 / .1888)   3/8    H-12-6 151 5/16 3/32
40, 39 .0995   1/2    H-12-8 153  
        3/4    H-12-12 173    
        1/4    H-13-4 210  
60, 59, 58, 57, 56, 3/64, 55, 54, .0400  13/64   5/16    H-13-5 212  
53 to (.2046 / .2043)   3/8    H-13-6 218 19/64 3/32
  .0595   1/2    H-13-8 221  
        3/4    H-13-12 253    
        1/4    H-13-4 145  
        5/16    H-13-5 148  
1/16, 52, 51, 50, 49, 48, 5/64, .0625  13/64   3/8    H-13-6 151 19/64 3/32
47, 46, 45, 44, 43, 42, 3/32, 41, to (.2046 / .2043)   1/2    H-13-8 153  
40, 39 .0995   3/4    H-13-12 173  
      1    H-13-16 203  
        1/4    H-16-4 136    
      5/16    H-16-5 137  
40, 39, 38, 37, 36, 7/64, 35, 34, .0980   1/4   3/8    H-16-6 141  
33, 32, 31, 1/8, 30, 29, 28, 9/64 to (.2516 / .2513)   1/2    H-16-8 142 23/64 3/32
  .1406   5/8    H-16-10 154  
      3/4    H-16-12 158  
      1    H-16-16 189  
      1-3/8    H-16-22 231    
** Price Code - See Separate Net Price Schedule
NOTE: Head Press Fit Bushings with .010" / .020" rough grinding stock on the O.D. are available,
please call for pricing.   Add the letter "U" to the end of the ANSI Symbol when ordering.  (HU-16-22)
 
10               National Bushing & Manufacturing Corp., 1936 Raymond Dr., Northbrook, IL 60062
 
ANSI And National Standard Bushings
Head Press Fit
   
Type H I.D. Range Standard I.D. Tolerance
(Drill Size) (add to nominal I.D.)
#80 to 1/4             +.0001 to +.0004
Over 1/4 to 3/4             +.0001 to +.0005
Over 3/4 to 1-1/2             +.0002 to +.0006
Over 1-1/2 to 2-3/4             +.0003 to +.0007
             A   B C     F G
     Standard ID Sizes Range in Body O.D. Length ANSI Price Head Head
Number, Letter, Or Fraction Sizes Inches Nominal (Actual) (Overall) Symbol Type "P"  Code ** Dia. Thick.
        1/4   H-20-4 122  
      5/16   H-20-5 125  
1/8, 30, 29, 28, 9/64, 27, 26, 25, .1250   5/16   3/8   H-20-6 128  
24, 23, 5/32, 22, 21, 20, 19, 18, to (.3141 / .3138)   1/2   H-20-8 129 27/64 1/8
11/64, 17, 16, 15, 14, 13, 3/16, .1935   5/8   H-20-10 130  
12, 11, 10,     3/4   H-20-12 132  
   
1 
  H-20-16 144  
      1-3/8   H-20-22 193  
      1-3/4   H-20-28 228    
        1/4   H-24-4 118  
10, 9, 8, 7, 13/64, 6, 5, 4, 3, .1935   3/8   3/8   H-24-6 124  
7/32, 2, 1, to (.3766 / .3763)   1/2   H-24-8 126 1/2 3/32
  .2280   3/4   H-24-12 129  
      1   H-24-16 139    
        1/4   H-26-4 119  
      5/16   H-26-5 120  
3/16, 12, 11, 10, 9, 8, 7, 13/64, .1875  13/32   3/8   H-26-6 124  
6, 5, 4, 3, 7/32, 2, 1, A, 15/64, to (.4078 / .4075)   1/2   H-26-8 126 1/2 5/32
B, C, D, 1/4, F .2570   3/4   H-26-12 128  
   
1 
  H-26-16 129  
      1-3/8   H-26-22 148  
      1-3/4   H-26-28 166    
        1/4   H-28-4 119  
        3/8   H-28-6 124  
  .2344   7/16   1/2   H-28-8 126 9/16 3/32
15/64, 1/4, F, 17/64, 9/32 to (.4392 / .4389)   5/8   H-28-10 128  
  .2812   3/4   H-28-12 129  
      1   H-28-16 139    
        1/4   H-32-4 118  
        5/16   H-32-5 120  
        3/8   H-32-6 124  
3/16, 12, 11, 10, 9, 8, 7, 13/64, .1875   1/2   1/2   H-32-8 126 39/64 7/32
6, 5, 4, 3, 7/32, 2, 1, A, 15/64, B, to (.5017 / .5014)   3/4   H-32-12 128  
C, D, 1/4, F, G, 17/64, H, I, J, K, .3160 1   H-32-16 138  
9/32, L, M, 19/64, N, 5/16, O     1-3/8   H-32-22 148  
      1-3/4   H-32-28 166    
  .3020     3/8   H-36-6 122  
N, 5/16, O, P, 21/64, Q, R, 11/32 to   9/16   1/2   H-36-8 122  
  .3438 (.5642 / .5639)   5/8   H-36-10 123 11/16 3/32
        3/4   H-36-12 124  
      1   H-36-16 128    
** Price Code - See Separate Net Price Schedule
NOTE: Head Press Fit Bushings with .010 / .020 rough grinding stock on the O.D. are available,
please call for pricing.   Add the letter "U" to the end of the ANSI Symbol when ordering.  (HU-16-22)
 
                                                Phone: 847-480-3030    Fax: 847-480-3576 11
 
ANSI and National  Standard Bushings
Head Press Fit
   
Type H All press fit bushings have lapped, honed or ground I.D.'s. 
Bushings with I.D.'s up to 1.0" are concentric to .0003" max.
T. I. R. to the O.D.  Larger sizes are concentric to .0005" T.I.R.
to the O.D. 
National bushings are not counterbored.
             A   B C     F G
   Standard ID Sizes Range in Body O.D. Length ANSI Price Head Head
Number, Letter, Or Fraction Sizes Inches Nominal (Actual) (Overall) Symbol Type "P"  Code ** Dia. Thick.
        1/4     H-40-4 124    
      5/16     H-40-5 118  
5/16, O, P, 21/64, Q, R, 11/32, .3125   5/8   3/8     H-40-6 120  
S, T, 23/64, U, 3/8, V, W, 25/64, to (.6267 / .6264)   1/2     H-40-8 120 51/64 7/32
X, Y, 13/32, Z, 27/64, 7/16 .4375   5/8     H-40-10 123  
      3/4     H-40-12 126  
      1          H-40-16 128  
      1-3/8     H-40-22 147  
      1-3/4     H-40-28 158  
      2-1/8     H-40-34 172    
        1/4     H-48-4 128  
      3/8     H-48-6 124  
      1/2     H-48-8 124  
5/16, O, P, 21/64, Q, R, 11/32, .3125   3/4   5/8     H-48-10 126  
S, T, 23/64, U, 3/8, V, W, 25/64, to (.7518 / .7515)   3/4     H-48-12 128 59/64 7/32
X, Y, 13/32, Z, 27/64, 7/16, .5312 1          H-48-16 132  
29/64, 15/32, 31/64, 1/2, 33/64,   1-1/4     H-48-20 148  
17/32     1-3/8     H-48-22 148  
      1-3/4     H-48-28 159  
      2-1/8     H-48-34 173  
      2-1/2     H-48-40 270    
        3/8     H-56-6 133  
      1/2     H-56-8 133  
      5/8     H-56-10 134  
1/2, 33/64, 17/32, 35/64, 9/16, .5000   7/8   3/4     H-56-12 134  
37/64, 19/32, 39/64, 5/8, 41/64, to (.8768 / .8765) 1          H-56-16 140  
21/32 .6562 1-1/4     H-56-20 145 1-7/64 1/4
    1-3/8     H-56-22 146  
      1-1/2     H-56-24 155  
      1-3/4     H-56-28 159  
      2-1/8     H-56-34 174  
      2-1/2     H-56-40 270    
        1/2     H-64-8 136  
1/2, 33/64, 17/32, 35/64, 9/16, .5000 1   3/4     H-64-12 137  
37/64, 19/32, 39/64, 5/8, 41/64, to (1.0018 / 1.0015) 1          H-64-16 141  
21/32, 43/64, 11/16, 45/64, .7656 1-3/8     H-64-22 147 1-15/64 5/16
23/32, 47/64, 3/4, 49/64   1-1/2     H-64-24 165  
      1-3/4     H-64-28 170  
      2-1/8     H-64-34 188  
      2-1/2     H-64-40 205  
      3     H-64-48 277    
** Price Code - See Separate Net Price Schedule
NOTE: Head Press Fit Bushings with .010 / .020 rough grinding stock on the O.D. are available,
please call for pricing.   Add the letter "U" to the end of the ANSI Symbol when ordering.  (HU-16-22)
 
12               National Bushing & Manufacturing Corp., 1936 Raymond Dr., Northbrook, IL 60062
 
                                            ANSI and National  Standard Bushings
                                                                                    Head Press Fit
   
Type H I.D. Range  Standard I.D. Tolerance
(Drill Size)     (add to nominal I.D.)
#80 to 1/4             +.0001 to +.0004
Over 1/4 to 3/4             +.0001 to +.0005
Over 3/4 to 1-1/2             +.0002 to +.0006
Over 1-1/2 to 2-3/4             +.0003 to +.0007
             A   B C     F G
  Standard ID Sizes Range in Body O.D. Length ANSI Price Head Head
Number, Letter, Or Fraction Sizes Inches Nominal (Actual) (Overall) Symbol Type "P"  Code ** Dia. Thick.
        5/8   H-80-10 163    
        3/4   H-80-12 158  
  .8750 1-1/4 1   H-80-16 168 1-1/2 1/4
7/8, 15/16 to (1.2520 / 1.2517) 1-1/4   H-80-20 178  
  .9375   1-1/2   H-80-24 186  
      1-3/4   H-80-28 194  
      2   H-80-32 210    
        1/2   H-88-8 165  
      3/4   H-88-12 166  
3/4, 49/64, 25/32, 51/64, 13/16, .7500 1-3/8
1
   H-88-16 176  
53/64, 27/32, 55/64, 7/8, 57/64, to (1.3772 / 1.3768) 1-3/8   H-88-22 188 1-39/64 3/8
29/32, 59/64, 15/16, 6//64, 1.0312 1-1/2   H-88-24 205  
31/32, 63/64, 1", 1-1/64, 1-1/32   1-3/4   H-88-28 205  
    2-1/8   H-88-34 223  
      2-1/2   H-88-40 241  
      3   H-88-48 304    
             
1", 1-1/64, 1-1/32, 1-3/64,       3/4   H-112-12 212  
1-1/16, 1-5/64, 1-3/32, 1-7/64, 1.0000  
1 
  H-112-16 198  
1-1/8, 1-9/64, 1-5/32, 1-11/64, to 1-3/4 1-3/8   H-112-22 212 1-63/64 3/8
1-3/16, 1-13/64, 1-7/32, 1.3906 (1.7523 / 1.7519) 1-3/4   H-112-28 227  
1-15/64, 1-1/4, 1-17/64, 1-9/32,   2-1/8   H-112-34 246  
1-19/64, 1-5/16, 1-21/64,   2-1/2   H-112-40 264  
1-11/32, 1-23/64, 1-3/8, 1-25/64   3   H-112-48 322  
             
1-3/8, 1-25/64, 1-13/32,            
1-27/64, 1-7/16, 1-29/64    
1 
  H-144-16 231  
1-15/32, 1-31/64, 1-1/2, 1.3750   1-3/8   H-144-22 249  
1-33/64, 1-17/32, 1-35/64, to 2-1/4 1-3/4   H-144-28 272  
1-9/16, 1-37/64, 1-19/32, 1.7500 (2.2525/2.2521) 2-1/8   H-144-34 288 2-31/64 3/8
1-39/64, 1-5/8, 1-41/64,   2-1/2   H-144-40 305  
1-21/32, 1-43/64, 1-11/16,   3   H-144-48 335  
1-45/64, 1-23/32, 1-47/64,          
1-3/4              
** Price Code - See Separate Net Price Schedule
NOTE: Head Press Fit Bushings with .010 / .020 rough grinding stock on the O.D. are available,
please call for pricing.   Add the letter "U" to the end of the ANSI Symbol when ordering.  (HU-16-22)
 
                                                 Phone: 847-480-3030    Fax: 847-480-3576 13