ANSI Standard Woodruff Key Size Table Chart ANSI B17.2-1967 (R1998)

Hardware ANSI Menu

All dimensions are given in inches.

The Woodruff Key numbers indicate normal key dimensions. The last two digits give the nominal diameter B in eighths of an inch and the digits preceding the last two give the nominal width W in thirty-seconds of an inch.

Key
Identifier
Nominal Size
W X B
Length
F
+ .000
-.010
Height
Distance
E
C
D
Max.
Min.
Max.
Min.
202
1/16 × 1⁄4
0.248
0.109
0.104
0.109
0.104
1/64
202.5
1/16 × 5⁄16
0.311
0.140
0.135
0.140
0.135
1/64
302.5
3/32 × 5⁄16
0.311
0.140
0.135
0.140
0.135
1/64
203
1/16 × 3⁄8
0.374
0.172
0.167
0.172
0.167
1/64
303
3/32 × 3⁄8
0.374
0.172
0.167
0.172
0.167
1/64
403
1⁄8 × 3⁄8
0.374
0.172
0.167
0.172
0.167
1/64
204
1/16 × 1⁄2
0.491
0.203
0.198
0.194
0.188
3/64
304
3/32 × 1⁄2
0.491
0.203
0.198
0.194
0.188
3/64
404
1⁄8 × 1⁄2
0.491
0.203
0.198
0.194
0.188
3/64
305
3/32 × 5⁄8
0.612
0.250
0.245
0.240
0.234
1/16
405
1⁄8 × 5⁄8
0.612
0.250
0.245
0.240
0.234
1/16
505
5⁄32 × 5⁄8
0.612
0.250
0.245
0.240
0.234
1/16
605
3⁄16 × 5⁄8
0.612
0.250
0.245
0.240
0.234
1/16
406
1⁄8 × 3⁄4
0.740
0.313
0.308
0.303
0.297
1/16
506
5⁄32 × 3⁄4
0.740
0.313
0.308
0.303
0.297
1/16
606
3⁄16 × 3⁄4
0.740
0.313
0.308
0.303
0.297
1/16
806
1⁄4 × 3⁄4
0.740
0.313
0.308
0.303
0.297
1/16
507
5⁄32 × 7⁄8
0.866
0.375
0.370
0.365
0.359
1/16
607
3⁄16 × 7⁄8
0.866
0.375
0.370
0.365
0.359
1/16
707
7⁄32 × 7⁄8
0.866
0.375
0.370
0.365
0.359
1/16
807
1⁄4 × 7⁄8
0.866
0.375
0.370
0.365
0.359
1/16
608
3⁄16 × 1
0.992
0.438
0.433
0.428
0.422
1/16
708
7⁄32 × 1
0.992
0.438
0.433
0.428
0.422
1/16
808
1⁄4 × 1
0.992
0.438
0.433
0.428
0.422
1/16
1008
5⁄16 × 1
0.992
0.438
0.433
0.428
0.422
1/16
1208
3⁄8 × 1
0.992
0.438
0.433
0.428
0.422
1/16
609
3⁄16 × 11⁄8
1.114
0.484
0.479
0.475
0.469
5/64
709
7⁄32 × 11⁄8
1.114
0.484
0.479
0.475
0.469
5/64
809
1⁄4 × 11⁄8
1.114
0.484
0.479
0.475
0.469
5/64
1009
5⁄16 × 11⁄8
1.114
0.484
0.479
0.475
0.469
5/64
610
3⁄16 × 11⁄4
1.240
0.547
0.542
0.537
0.531
5/64
710
7⁄32 × 11⁄4
1.240
0.547
0.542
0.537
0.531
5/64
810
1⁄4 × 11⁄4
1.240
0.547
0.542
0.537
0.531
5/64
1010
5⁄16 × 11⁄4
1.240
0.547
0.542
0.537
0.531
5/64
1210
3⁄8 × 11⁄4
1.240
0.547
0.542
0.537
0.531
5/64
811
1⁄4 × 13⁄8
1.362
0.594
0.589
0.584
0.578
3/32
1011
5⁄16 × 13⁄8
1.362
0.594
0.589
0.584
0.578
3/32
1211
3⁄8 × 13⁄8
1.362
0.594
0.589
0.584
0.578
3/32
812
1⁄4 × 11⁄2
1.484
0.641
0.636
0.631
0.625
7/64
1012
5⁄16 × 11⁄2
1.484
0.641
0.636
0.631
0.625
7/64
1212
3⁄8 × 11⁄2
1.484
0.641
0.636
0.631
0.625
7/64
  1. Dimensions in inches

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