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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