Washer Dimensions - USS / SAE / Structural
Printable shop wall chart: Washer Dimensions - USS / SAE / Structural. Free letter-size PDF to print and post at the counter; 25 x 36 inch poster version available.
Inch flat washers (ASME B18.21.1 / ASTM F844), in
| Bolt | USS | SAE |
|---|---|---|
| 1/4 | 5/16 x 3/4 x 0.065 | 9/32 x 5/8 x 0.065 |
| 5/16 | 3/8 x 7/8 x 0.083 | 11/32 x 11/16 x 0.065 |
| 3/8 | 7/16 x 1 x 0.083 | 13/32 x 13/16 x 0.065 |
| 7/16 | 1/2 x 1-1/4 x 0.083 | 15/32 x 59/64 x 0.065 |
| 1/2 | 9/16 x 1-3/8 x 0.109 | 17/32 x 1-1/16 x 0.095 |
| 5/8 | 11/16 x 1-3/4 x 0.134 | 21/32 x 1-5/16 x 0.095 |
| 3/4 | 13/16 x 2 x 0.148 | 13/16 x 1-15/32 x 0.134 |
| 7/8 | 15/16 x 2-1/4 x 0.165 | 29/32 x 1-3/4 x 0.134 |
| 1 | 1-1/16 x 2-1/2 x 0.165 | 1-1/16 x 2 x 0.134 |
ASTM F436 hardened, in
| Bolt | ID | OD | Thickness |
|---|---|---|---|
| 1/2 | 0.531 | 1.063 | 0.097 - 0.177 |
| 5/8 | 0.688 | 1.313 | 0.122 - 0.177 |
| 3/4 | 0.813 | 1.469 | 0.122 - 0.177 |
| 7/8 | 0.938 | 1.750 | 0.136 - 0.177 |
| 1 | 1.125 | 2.000 | 0.136 - 0.177 |
Metric ISO 7089 / DIN 125A, mm
| Bolt | ID | OD | Thickness |
|---|---|---|---|
| M6 | 6.4 | 12 | 1.6 |
| M8 | 8.4 | 16 | 1.6 |
| M10 | 10.5 | 20 | 2.0 |
| M12 | 13 | 24 | 2.5 |
| M16 | 17 | 30 | 3.0 |
| M20 | 21 | 37 | 3.0 |
| M24 | 25 | 44 | 4.0 |
SAE = ASME B18.21.1 Type A Narrow; USS = Type A Wide. ISO 7090 is the chamfered version of ISO 7089 with the same dimensions. Nominal values; confirm tolerances in the standard. USS and SAE washers are not hardened and do not replace F436.
These tables carry the same figures as the printed sheet below.
The printed sheet
25 x 36 inch poster version
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Text version of this sheet
F436
USS FLAT
SAE FLAT
F436 HARDENED
Nominal washer dimensions · ID x OD x thickness
Inch flat washers (ASME B18.21.1 / ASTM F844), in
Bolt
USS
SAE
1/4
5/16 x 3/4 x 0.065
9/32 x 5/8 x 0.065
5/16
3/8 x 7/8 x 0.083
11/32 x 11/16 x 0.065
3/8
7/16 x 1 x 0.083
13/32 x 13/16 x 0.065
7/16
1/2 x 1-1/4 x 0.083
15/32 x 59/64 x 0.065
1/2
9/16 x 1-3/8 x 0.109
17/32 x 1-1/16 x 0.095
5/8
11/16 x 1-3/4 x 0.134
21/32 x 1-5/16 x 0.095
3/4
13/16 x 2 x 0.148
13/16 x 1-15/32 x 0.134
7/8
15/16 x 2-1/4 x 0.165
29/32 x 1-3/4 x 0.134
1
1-1/16 x 2-1/2 x 0.165
1-1/16 x 2 x 0.134
ASTM F436 hardened, in
Bolt
ID
OD
Thickness
1/2
0.531
1.063
0.097 - 0.177
5/8
0.688
1.313
0.122 - 0.177
3/4
0.813
1.469
0.122 - 0.177
7/8
0.938
1.750
0.136 - 0.177
1
1.125
2.000
0.136 - 0.177
Metric ISO 7089 / DIN 125A, mm
Bolt
ID
OD
Thickness
M6
6.4
12
1.6
M8
8.4
16
1.6
M10
10.5
20
2.0
M12
13
24
2.5
M16
17
30
3.0
M20
21
37
3.0
M24
25
44
4.0
SAE = ASME B18.21.1 Type A Narrow; USS = Type A Wide. ISO 7090 is the chamfered version of ISO 7089 with the same dimensions. Nominal values; confirm tolerances in the standard.
USS and SAE washers are not hardened and do not replace F436.
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Fastener Guide reference FG-8D6F34 · thefastenerapp.com/fastener-guide/wall-charts/washer-dimensions-uss-sae-structural · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
