NEMA - QUICK REFERENCE CHART


NEMA
SHAFT		 KEYSEAT NEMA
SHAFT		 KEYSEAT
DIMENSIONS DIMENSIONS
(U) (R) (S) (U) (R) (S)
3/8 21/64 FLAT 1-7/8 1-19/32 1/2
1/2 29/64 FLAT 2-1/8 1-27/32 1/2
5/8 33/64 3/16 2-3/8 2-1/64 5/8
7/8 49/64 3/16 2-1/2 2-3/16 5/8
1-1/8 63/64 1/4 2-7/8 2-29/64 3/4
1-3/8 1-13/64 5/16 3-3/8 2-7/8 7/8
1-5/8 1-13/32 3/8 3-7/8 3-5/16 1

NEMA
FRAME		 D E 2F H N O P U V AA AB AH AJ AK BA BB BD XO TAP
42 2-5/8 1-3/4 1-11/16 9/32
SLOT		 1-1/2 5 4-11/16 3/8 1-1/8 3/8 4-1/32 1-5/16 3-3/4 3 2-1/16 1/8 4-5/8 1-9/16 1/4-20
48 3 2-1/8 2-3/4 11/32
SLOT		 1-7/8 5-7/8 5-11/16 1/2 1-1/2 1/2 4-3/8 1-11/16 3-3/4 3 2-1/2 1/8 5-5/8 2-1/4 1/4-20
56
56H		 3-1/2 2-7/16 3 11/32
SLOT		 2-7/16
2-1/18		 6-7/8 6-5/8 5/8 1-7/8 1/2 5 2-1/16 5-7/8 4-1/2 2-3/4 1/8 6-1/2 2-1/4 3/8-16
143T
145T		 3-1/2 2-3/4 4
5		 11/32 2-1/2 6-7/8 6-5/8 7/8 2-1/4 3/4 5-1/4 2-1/8 5-7/8 4-1/2 2-1/4 1/8 6-1/2 2-1/4 3/8-16
182
184
182T
184T		 4-1/2

 3-3/4

 4-1/2
5-1/2
4-1/2
5-1/2		 13/32

 2-11/16
2-11/16
3-9/16
3-9/16		 8-11/16

 7-7/8

 7/8
7/8
1-1/8
1-1/8		 2-1/4
2-1/4
2-3/4
2-3/4		 3/4 5-7/8 2-1/8
2-1/8
2-5/8
2-5/8		 5-7/8
5-7/8
7-1/4
7-1/4		 4-1/2
4-1/2
8-1/2
8-1/2		 2-3/4 1/8
1/8
1/4
1/4		 6-1/2
6-1/2
9
9		 2-3/8 3/8-16
3/8-16
1/2-13
1/2-13
213
215
213T
215T		 5-1/4

 4-1/4

 5-1/2
7
5-1/2
7		 13/32

 3-1/2
3-1/2
3-7/8
3-7/8		 10-1/4

 9-9/16

 1-1/8
1-1/8
1-3/8
1-3/8		 3
3
3-3/8
3-3/8		 3/4

 7-3/8

 2-3/4
2-3/4
3-1/8
3-1/8		 7-1/4

 8-1/2

 3-1/2

 1/4

 9

 2-3/4

 1/2-13
254U
256U
254T
256T		 6-1/4

 5

 8-1/4
10
8-1/4
10		 17/32

 4-1/16
4-1/16
4-5/16
4-5/16		 12-7/8

 12-15/16

 1-3/8
1-3/8
1-5/8
1-5/8		 3-3/4
3-3/4
4
4		 1

 9-5/8

 3-1/2
3-1/2
3-3/4
3-3/4		 7-1/4

 8-1/2

 4-1/4

 1/4

 10

 ---

 1/2-13
284U
286U
284T
286T
284TS
286TS		 7

 5-1/2

 9-1/2
11
9-1/2
11
9-1/2
11		 17/32

 5-1/8
5-1/8
4-7/8
4-7/8
3-3/8
3-3/8		 14-5/8

 14-5/8

 1-5/8
1-5/8
1-7/8
1-7/8
1-5/8
1-5/8		 4-7/8
4-7/8
4-5/8
4-5/8
3-1/4
3-1/4		 1-1/2

 13-1/8

 4-5/8
4-5/8
4-3/8
4-3/8
3
3		 9

 10-1/2

 4-3/4

 1/4

 11-1/4

 ---

 1/2-13
324U
326U
324T
326T
324TS
326TS		 8 6-1/4 10-1/2
12
10-1/2
12
10-1/2
12		 21/32 5-7/8
5-7/8
5-1/2
5-1/2
3-15/16
3-15/16		 16-1/2 16-1/2 1-7/8
1-7/8
2-1/8
2-1/8
1-7/8
1-7/8		 5-5/8
5-5/8
5-1/4
5-1/4
3-3/4
3-3/4		 2 14-1/8 5-3/8
5-3/8
5
5
3-1/2
3-1/2		 11 12-1/2 5-1/4 1/4 13-3/8 --- 5/8-11
364U
365U
364T
365T
364TS
365TS		 9 7 11-1/4
12-1/4
11-1/4
12-1/4
11-1/4
12-1/4		 21/32 6-3/4
6-3/4
6-1/4
6-1/4
4
4		 18-1/2 18-1/4 2-1/8
2-1/8
2-3/8
2-3/8
1-7/8
1-7/8		 6-3/8
6-3/8
5-7/8
5-7/8
3-3/4
3-3/4		 2-1/2 15-1/16 6-1/8
6-1/8
5-5/8
5-5/8
3-1/2
3-1/2		 11 12-1/2 5-7/8 1/4 13-3/8 --- 5/8-11
404U
405U
404T
405T
404TS
405TS		 10

 8

 12-1/4
13-3/4
12-1/4
13-3/4
12-1/4
13-3/4		 13/16

 7-3/16
7-3/16
7-5/16
7-5/16
4-1/2
4-1/2		 20-5/16

 20-1/8

 2-3/8
2-3/8
2-7/8
2-7/8
2-1/8
2-1/8		 7-1/8
7-1/8
7-1/4
7-1/4
4-1/4
4-1/4		 3

 18

 6-7/8
6-7/8
7
7
4
4		 11

 12-1/2

 6-5/8

 1/4

 13-7/8

 ---

 5/8-11
444U
445U
444T
445T
447T
449T
444TS
445TS
447TS
449TS
 11

 9

 14-1/2
16-1/2
14-1/2
16-1/2
20
25
14-1/2
16-1/2
20
25
 13/16

 8-5/8
8-5/8
8-1/2
8-1/2
8-15/16
8-15/16
5-3/16
5-3/16
4-15/16
4-15/16
 22-7/8
22-7/8
22-7/8
22-7/8
22-15/16
22-15/16
22-7/8
22-7/8
22-15/16
22-15/16
 22-3/8
22-3/8
22-3/8
22-3/8
23-3/4
23-3/4
22-3/8
22-3/8
23-3/4
23-3/4
 2-7/8
2-7/8
3-3/8
3-3/8
3-3/8
3-3/8
2-3/8
2-3/8
2-3/8
2-3/8
 8-5/8
8-5/8
8-1/2
8-1/2
8-1/2
8-1/2
4-3/4
4-3/4
4-3/4
4-3/4



3



4NPT
4NPT		 19-9/16
19-9/16
19-9/16
19-9/16
21-11/16
21-11/16
19-9/16
19-9/16
21-11/16
21-11/16		 8-3/8
8-3/8
8-1/4
8-1/4
8-1/4
8-1/4
4-1/2
4-1/2
4-1/2
4-1/2		 14

 16

 7-1/2

 1/4

 16-3/4

 ---

 5/8-11

5000
FRAME		 D E 2F H O P U V AA AB BA
5007S
5007L		 12-1/2
12-1/2		 10
10		 22
22		 15/16
15/16		 26-27/32
26-27/32		 30
30		 2-1/2
3-7/8		 6-1/2
11-1/8		 4-NPT
4-NPT		 26-7/8
26-7/8		 8-1/2
8-1/2
5009S
5009L		 12-1/2
12-1/2		 10
10		 28
28		 15/16
15/16		 26-27/32
26-27/32		 30
30		 2-1/2
3-7/8		 6-1/2
11-1/8		 4-NPT
4-NPT		 26-7/8
26-7/8		 8-1/2
8-1/2
5011S
5011L		 12-1/2
12-1/2		 10
10		 36
36		 15/16
15/16		 26-27/32
26-27/32		 30
30		 2-1/2
3-7/8		 6-1/2
11-1/8		 4-NPT
4-NPT		 26-7/8
26-7/8		 8-1/2
8-1/2

NEMA C-FACE BA DIMENSIONS
143-5TC 2-3/4
182-4TC 3-1/2
213-5TC 4-1/4
254-6TC 4-3/4

FRAME NEMA FRAMES PRIOR TO 1953
D E F N U V BA
66 4-1/8 2-15/16 2-1/2 2-1/4 3/4 2-1/4 3-1/8
203 5 4 2-3/4 2-7/16 3/4 2 3-1/8
204 3-1/4
224 5-1/2 4-1/2 3-3/8 3-1/4 1 3 3-1/2
225 3-3/4
254 6-1/4 5 4-1/8 3-7/16 1-1/8 3-3/8 4-1/4
284 7 5-1/2 4-3/4 4-1/4 1-1/4 3-3/4 4-3/4
324 8 6-1/4 5-1/4 5-3/8 1-5/8 4-7/8 5-1/4
326 6
364 9 7 5-5/8 5-5/8 1-78/8 5-3/8 5-7/8
365 6-1/8
404 10 8 6-1/8 6-3/8 2-1/8 6-1/8 6-5/8
405 6-7/8
444 11 9 7-1/4 7-1/8 2-3/8 6-7/8 7-1/2
445 8-1/4
504 12-1/2 10 8 8-5/8 2-7/8 8-3/8 8-1/2
505 9




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