Engineering Reference

Rod End & Spherical Bearings

Locking Devices, Keys & Keyways

Keys are metallic locking devices that, when assembled into keyways and keyslots, prevent relative motion between mating components of bearing linkage assemblies. NHBB does not manufacture keys, nuts, or lock wire as separate items. They are readily available from other sources. Keyways and keyslots are optional. To specify, add suffix “W” to NHBB catalog rod end part number.


NAS 559 TYPE A KEY

  1. The keyways and keyslots used in conjunction with these keys are shown in A and B. The NAS 559 keys are available for thread sizes 1/4 through 2-1/4 inches.
  2. Keyway flat may vary from standard on smaller size rod ends but shall extend at least beyond minimum thread length in all cases.
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NAS 559 type A key.

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Male keyslot.

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Female keyslot.

Thread Size Detail 

Thread Size 1

(D)
+.005
-.000

(E)
+.005
-.000

(F)
+.000
-.005

(R)
±.010

.250
.312
.375
.437
.500

.056
.056
.056
.069
.069

.06
.062
.093
.093
.093

.201
.260
.311
.370
.436

.255
.255
.255
.255
.255

.562
.625
.750
.875
1.000

.077
.077
.077
.086
.094

.125
.125
.125
.156
.156

.478
.541
.663
.777
.900

.255
.255
.255
.318
.318

1.125
1.250
1.375
1.500
1.625

.094
.116
.116
.116
.129

.187
.187
.250
.250
.250

1.010
1.136
1.236
1.361
1.477

.382
.382
.445
.445
.445

1.750
1.875
2.000
2.125
2.250

.129
.129
.129
.129
.129

.312
.312
.312
.312
.312

1.589
1.714
1.839
1.955
2.080

.508
.508
.508
.508
.508



AS81935

  1. AS81935/3 keys are used on AS81935 sizes -3 through -8 when optioned. The keyways and keyslots used in conjunction with these keys are shown in A and B.
  2. *AS81935/3 keys are available for thread sizes 1/4 through 1/2 inches.
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AS81935 key.

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Male keyslot.

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Female keyslot.

Thread Size Detail 

*Thread
(Male)

(E)
+.005
-.000

(F)
+.000
-.005

1/4-28UNJF-3A

.062

.207

5/16-24UNJF-3A

.062

.268

3/8-24UNJF-3A

.093

.319

7/16-20UNJF-3A

.093

.383

1/2-20UNJF-3A

.093

.445



NAS 513 KEY

  1. NAS 513 keys are used on AS81935 sizes -10 through -16 rod ends when optioned. The keyways and keyslots used in conjunction with these keys are shown in A and B.
  2. * For female rod ends with deep square slot keyslot option AS81935 designation "W", the slot depth is modified as detailed in A. This deep slot "W" is also compatible with NASM14198, SAE-AS14227, NAS 1193 and NAS 559 keyways.
  3. **NAS 513 keys are available for thread sizes 1/4 through 2-1/4 inches.
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NAS 513 key.

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Male keyway.

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Female keyslot.

Thread Size Detail 

Thread Size 3**

(D)
+.005
-.000

(DD) 2*
+.005
-.000

(E)
+.005
-.000

(F)
+.000
-.005

.250
.312
.375
.437
.500

.056
.056
.056
.069
.069

.110
.110
.110
.110
.110

.062
.062
.093
.093
.093

.201
.260
.311
.370
.436

.562
.625
.750
.875
1.000

.077
.077
.077
.086
.094

-
.125
.125
.156
.156

.125
.125
.125
.156
.156

.478
.541
.663
.777
.900

1.125
1.250
1.375
1.500
1.625

.094
.116
.116
.116
.129

-
-
-
-
-

.187
.187
.250
.250
.250

1.010
1.136
1.236
1.361
1.477

1.750
1.875
2.000
2.125
2.250

.129
.129
.129
.129
.129

-
-
-
-
-

.312
.312
.312
.312
.312

1.589
1.714
1.839
1.955
2.080



NAS 1193 KEY

  1. NAS 1193 keys are for positive indexing. They are used in applications in which a fine adjustment is required, within .001.
  2. These keys can be used in conjunction with NAS 513, NAS 559 and AS81935/3 keyways or keyslots and are available for thread sizes 1/4 through 2-1/4 inches.
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NAS 1193 key.