HEX NUT IDENTIFICATION CHART

  • ESPT - Extra small / Thin
  • ESP - Extra Small Pattern
  • SP - Small Pattern
  • SPT - Small Pattern / Thin
  • SSP - Speical Small Pattern
  • MS - Machine Screw Nut
  • MST - Machine Screw / Thin
  • F - Finished Hex
  • FJ - Finished Jam
  • FT - Finished Thick
  • HJ - Heavy Jam
  • H - Heavy Hex

SIZE
A.F.
THICKNESS
CODE
SIZE
A.F.
THICKNESS
CODE
0
3/32
0.0480
ESP
3/8
9/16
21/64
F
0
1/8
3/64
SP
3/8
9/16
13/32
FT
0
5/32
3/64
SM
3/8
5/8
1/4
MS
1
5/32
3/64
SM
3/8
11/16
15/64
HJ
2
5/32
1/16
SP
3/8
11/16
23/64
H
2
3/16
1/16
MS
7/16
11/16
1/4
FJ
3
3/16
1/16
MS
7/16
11/16
3/8
F
4
3/16
1/16
SP
7/16
11/16
29/64
FT
4
1/4
5/64
MST
7/16
3/4
17/64
HJ
4
1/4
3/32
MS
7/16
3/4
27/64
H
5
3/16
1/16
ESP
1/2
3/4
5/16
FJ
5
1/4
3/32
SP
1/2
3/4
7/16
F
5
5/16
7/64
MS
1/2
3/4
9/16
FT
6
3/16
1/16
ESP
1/2
7/8
19/64
HJ
6
1/4
5/64
SPT
1/2
7/8
31/64
H
6
1/4
3/32
SP
9/16
7/8
5/16
FJ
6
5/16
7/64
MS
9/16
7/8
31/64
F
8
1/4
5/64
ESPT
9/16
7/8
39/64
FT
8
1/4
3/32
ESP
9/16
15/16
21/64
HJ
8
5/16
7/64
SP
9/16
15/16
35/64
H
8
11/32
1/8
MS
5/8
15/16
3/8
FJ
10
1/4
3/32
SSP
5/8
15/16
35/64
F
10
5/16
7/64
ESP
5/8
15/16
23/32
FT
10
11/32
1/8
SP
5/8
1-1/16
23/64
HJ
10
3/8
1/8
MS
5/8
1-1/16
39/64
H
12
3/8
1/8
SP
3/4
1-1/8
27/64
FJ
12
7/16
5/32
MS
3/4
1-1/8
41/64
F
1/4
7/16
5/32
FJ
3/4
1-1/8
13/16
FT
1/4
7/16
3/16
MS
3/4
1-1/4
27/64
HJ
1/4
7/16
7/32
FJ
3/4
1-1/4
47/64
H
1/4
7/16
9/32
FT
7/8
1-5/16
31/64
FJ
1/4
1/2
11/64
HJ
7/8
1-5/16
3/4
F
1/4
1/2
15/64
HJ
7/8
1-5/16
29/32
FT
5/16
1/2
3/16
FJ
7/8
1-7/16
31/64
HJ
5/16
1/2
17/64
F
7/8
1-7/16
55/64
H
5/16
1/2
21/64
FT
1"
1-1/2
35/64
FJ
5/16
9/16
13/64
HJ
1"
1-1/2
55/64
F
5/16
9/16
7/32
MS
1"
1-1/2
1"
FT
5/16
9/16
19/64
HJ
1"
1-5/8
35/64
HJ
3/8
9/16
7/32
FJ
1"
1-5/8
63/64
H

  • ESPT - Extra small / Thin
  • ESP - Extra Small Pattern
  • SP - Small Pattern
  • SPT - Small Pattern / Thin
  • SSP - Speical Small Pattern
  • MS - Machine Screw Nut
  • MST - Machine Screw / Thin
  • F - Finished Hex
  • FJ - Finished Jam
  • FT - Finished Thick
  • HJ - Heavy Jam
  • H - Heavy Hex
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