Earnest Technical Library
Technical Library Online Catalog

BASIC DIMENSIONS FOR INCH SERIES HEX NUTS



Regular (Finished Full) Hex




Size Width Across Flats Finished Full Nuts Finished Jam Nut Thick Nut
    Thickness Thickness Thickness
1/4 7/16 7/32 5/32 9/32
5/16 1/2 17/64 3/16 21/64
3/8 9/16 21/64 7/32 13/32
7/16 11/16 3/8 1/4 29/64
1/2 3/4 7/16 5/16 9/16
9/16 7/8 31/64 5/16 39/64
5/8 15/16 35/64 3/8 23/32
3/4 1 1/8 41/64 27/64 13/16
7/8 1 5/16 3/4 31/64 29/32
1 1 1/2 55/64 35/64 1
1 1/8 1 11/16 31/32 39/64 1 5/32
1 1/4 1 7/8 1 1/16 23/32 1 1/4
1 3/8 2 1/16 1 11/64 25/32 1 3/8
1 1/2 2 1/4 1 9/32 27/32 1 1/2
1 5/8 2 7/16  1 25/64 29/32 -
1 3/4 2 5/8 1 1/2 31/32 -
1 7/8 2 3/4 1 3/4 1 1/32 -
2 3 1 23/32 1 3/32 -
2 1/4 3 3/8 1 59/64 1 13/64 -
2 1/2 3 3/4 2 9/64 1 29/64 -
2 3/4 4 1/8 2 23/64 1 37/64 -
3 4 1/2 2 37/64 1 45/64 -

 (Finished) Jam Nut




Size Width Across
Flats		 Hvy Hex
Nut		 Hvy Hex
Jam
    Thickness Thickness
1/4 1/2 15/64 11/64
5/16 9/16 19/64 13/64
3/8 11/16 23/64 15/64
7/16 3/4 27/64 17/64
1/2 7/8 31/64 19/64
9/16 15/16 35/64 21/64
5/8 1 1/16 39/64 23/64
3/4 1 1/4 47/64 27/64
7/8 1 7/16 55/64 31/64
1 1 5/8 63/64 35/64
1 1/8 1 13/16 1 7/64 39/64
1 1/4 2 1 7/32 23/32
1 3/8 2 3/16 1  11/32 25/32
1 1/2 2 3/8  1 15/32 27/32
1 5/8 2 9/16 1 19/32 29/32
1 3/4 2 3/4 1 23/32 31/32
1 7/8 2 15/16 1 27/32 1 1/32
2 3 1/8 1 31/32 1 3/32
2 1/4 3 1/2 2 13/64 1 13/64
2 1/2 3 7/8 2 29/64 1 29/64
2 3/4 4 1/4 2 45/64 1 37/64
3 4 5/8 2 61/64 1 45/64
3 1/4 5 3 3/16 1 13/16
3 1/2 5 3/8 3 7/16 1 15/16
3 3/4 5 3/4 3 11/16 2 1/16
4 6 1/8 3 15/16 2 3/16


Thick, Heavy Hex and Heavy Hex Jam 




Size TPI Minor Dia (2B)
    Min Max
  1/4 20 .196 .207
28 .211 .220
  5/16 18 .252 .265
24 .267 .277
  3/8 16 .307 .321
24 .330 .340
  7/16 14 .360 .376
20 .383 .395
  1/2 13 .417 .434
20 .446 .457
  9/16 12 .472 .490
18 .502 .515
  5/8 11 .527 .546
18 .565 .578
  3/4 10 .642 .663
16 .682 .696
  7/8 9 .755 .778
14 .798 .813
  1 8 .865 .890
14 .923 .938
  1 1/8 7 .970 .998
12 1.035 1.053
  1 1/4 7 1.095 1.123
12 1.160 1.178
  1 3/8 6 1.195 1.225
12 1.285 1.303
  1 1/2 6 1.320 1.350
12 1.410 1.428
  1 3/4 5 1.533 1.567
12 1.660 1.678
  2 4 1/2 1.759 1.795
12 1.910 1.928
  2 1/4 4 1/2 2.009 2.045
12 2.160 2.178
  2 1/2 4 2.229 2.267
12 2.410 2.428
  2 3/4 4 2.479 2.517
12 2.660 2.678
  3 4 2.729 2.767
12 2.910 2.928
  3 1/2 4 3.229 3.267
12 3.410 3.428