Head Type

Head Press Fit Type H, ANSI Part Numbers, I.D. and O.D.
Head Type

A
Standard I.D. Sizes		 B
BODY O.D. Nominal (Actual)		 C LENGTH (Under Head) ANSI SYMBOL TYPE H E Head Diameter F Head Thickness
Number, Letter, or Fraction Sizes Range of
Dec. Equiv.
80, 79, 1/64, 78, 77, 76, 75, 74, 73, 72, 71, 70

.0135 to .0280

5/32
(.1578 / .1575)

1/4
5/16
3/8
1/2

H-10-4
H-10-5
H-10-6
H-10-8

1/4

3/32
69, 68, 1/32, 67, 66, 65, 64, 63, 62, 61, 60, 59, 58, 57, 56, 3/64

.0292 to .0469

5/32
(.1578 / .1575)

1/4
5/16
3/8
1/2

H-10-4
H-10-5
H-10-6
H-10-8

1/4

3/32
55, 54, 53, 1/16

.0520 to .0625

5/32
(.1578 / .1575)

1/4
5/16
3/8
1/2

H-10-4
H-10-5
H-10-6
H-10-8

1/4

3/32
1/16, 52, 51, 50, 49, 48, 5/64, 47, 46, 45, 44, 43, 42, 3/32, 41, 40, 39

.0625 to .0995

3/16
(.1891 / .1888)

1/4
5/16
3/8
1/2
3/4

H-12-4
H-12-5
H-12-6
H-12-8
H-12-12

5/16

3/32
60, 59, 58, 57, 56, 3/64, 55, 54, 53

.0400 to .0595

13/64
(.2046 / .2043)

1/4
5/16
3/8
1/2
3/4

H-13-4
H-13-5
H-13-6
H-13-8
H-13-12

19/64

3/32
1/16, 52, 51, 50, 49, 48, 5/64, 47, 46, 45, 44, 43, 42, 3/32, 41, 40, 39

.0625 to .0995

13/64
(.2046 / .2043)

1/4
5/16
3/8
1/2
3/4
1

H-13-4
H-13-5
H-13-6
H-13-8
H-13-12
H-13-16

19/64

3/32
40, 39, 38, 37, 36, 7/64, 35, 34, 33, 32, 31, 1/8, 30, 29, 28, 9/64

.0980 to .1406

1/4
(.2516 / .2513)

1/4
5/16
3/8
1/2
5/8
3/4
1
1-3/8

H-16-4
H-16-5
H-16-6
H-16-8
H-16-10
H-16-12
H-16-16
H-16-22

23/64

3/32
1/8, 30, 29, 28, 9/64, 27, 26, 25, 24, 23, 5/32, 22, 21, 20, 19, 18, 11/64, 17, 16, 15, 14, 13, 3/16, 12, 11, 10

.1250 to .1935

5/16
(.3141 / .3138)

1/4
5/16
3/8
1/2
5/8
3/4
1
1-3/8
1-3/4

H-20-4
H-20-5
H-20-6
H-20-8
H-20-10
H-20-12
H-20-16
H-20-22
H-20-28

27/64

1/8
10, 9, 8, 7, 13/64, 6, 5, 4, 3, 7/32, 2, 1

.1935 to .2280

3/8
(.3766 / .3763)

1/4
3/8
1/2
3/4
1

H-24-4
H-24-6
H-24-8
H-24-12
H-24-16

1/2

3/32
3/16, 12, 11, 10, 9, 8, 7, 13/64, 6, 5, 4, 3, 7/32, 2, 1, A, 15/64, B, C, D, 1/4, F

.1875 to .2570

13/32
(.4078 / .4075)

1/4
5/16
3/8
1/2
3/4
1
1-3/8
1-3/4

H-26-4
H-26-5
H-26-6
H-26-8
H-26-12
H-26-16
H-26-22
H-26-28

1/2

5/32
15/64, 1/4, F, 17/64, 9/32

.2544
.2500
.2570
.2656
.2812

7/16
(.4392 / .4389)

1/4
3/8
1/2
5/8
3/4
1

H-28-4
H-28-6
H-28-8
H-28-10
H-28-12
H-28-16

9/16

3/32
3/16, 12, 11, 10, 9, 8, 7, 13/64, 6, 5, 4, 3, 7/32, 2, 1, A, 15/64, B, C, D, 1/4, F, G, 17/64, H, I, J, K, 9/32, L, M, 19/64, N, 5/16, O

.1875 to .3180

1/2
(.5017 / .5014)

1/4
5/16
3/8
1/2
3/4
1
1-3/8
1-3/4

H-32-4
H-32-5
H-32-6
H-32-8
H-32-12
H-32-16
H-32-22
H-32-28

39/64

7/32
N, 5/16, O, P, 21/64, Q, R, 11/32

.3020 to .3438

9/16
(.5642 / .5639)

3/8
1/2
5/8
3/4
1

H-36-6
H-36-8
H-36-10
H-36-12
H-36-16

11/16

3/32
5/16, O, P, 21/64, Q, R, 11/32, S, T, 23/64, U, 3/8, V, W, 25/64, X, Y, 13/32, Z, 27/64, 7/16

.3125 to .4375

5/8
(.6267 / .6264)

1/4
5/16
3/8
1/2
5/8
3/4
1
1-3/8
1-3/4
2-1/8

H-40-4
H-40-5
H-40-6
H-40-8
H-40-10
H-40-12
H-40-16
H-40-22
H-40-28
H-40-34

51/64

7/32
5/16, O, P, 21/64, Q, R, 11/32, S, T, 23/64, U, 3/8, V, W, 25/64, X, Y, 13/32, Z, 27/64, 7/16, 29/64, 15/32, 31/64, 1/2, 33/64, 17/32

.3125 to .5312

3/4
(.7518 / .7515)

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

H-48-4
H-48-6
H-48-8
H-48-10
H-48-12
H-48-16
H-48-20
H-48-22
H-48-28
H-48-34
H-48-40

59/64

7/32
1/2, 33/64, 17/32, 35/64, 9/16, 37/64, 19/32, 39/64, 5/8, 41/64, 21/32

.5000 to .6562

7/8
(.8768 / .8765)

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

H-56-6
H-56-8
H-56-10
H-56-12
H-56-16
H-56-20
H-56-22
H-56-24
H-56-28
H-56-34
H-56-40

1-7/64

1/4
1/2, 33/64, 17/32, 35/64, 9/16, 37/64, 19/32, 39/64, 5/8, 41/64, 21/32, 43/64, 11/16, 45/64, 23/32, 47/64, 3/4, 49/64

.5000 to .7656

1
(1.0018 / 1.0015)

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

H-64-8
H-64-12
H-64-16
H-64-22
H-64-24
H-64-28
H-64-34
H-64-40
H-64-48

1-15/64

5/16
7/8 and 15/16

.8750 & .9375

1-1/4
(1.2520 / 1.2517)

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

H-80-10
H-80-12
H-80-16
H-80-20
H-80-24
H-80-28
H-80-32

1-1/2

1/4
3/4, 49/64, 25/32, 51/64, 13/16, 53/64, 27/32, 55/64, 7/8, 57/64, 29/32, 59/64, 15/16, 61/64, 31/32, 63/64, 1″, 1‑1/64, 1‑1/32

.7500 to 1.0312

1-3/8
(1.3772 / 1.3768)

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

H-88-8
H-88-12
H-88-16
H-88-22
H-88-24
H-88-28
H-88-34
H-88-40
H-88-48

1-39/64

3/8
1″, 1‑1/64, 1‑1/32, 1‑3/64, 1‑1/16, 1‑5/64, 1‑3/32, 1‑7/64, 1‑1/8, 1‑9/64, 1‑5/32, 1‑11/64, 1‑3/16, 1‑13/64, 1‑7/32, 1‑15/64, 1‑1/4, 1‑17/64, 1‑9/32, 1‑19/64, 1‑5/16, 1‑21/64, 1‑11/32, 1‑23/64, 1‑3/8, 1‑25/64

1.0000
to
1.3906

1-3/4
(1.7523 / 1.7519)

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

H-112-12
H-112-16
H-112-22
H-112-28
H-112-34
H-112-40
H-112-48

1-63/64

3/8
1‑3/8, 1‑25/64, 1‑13/32, 1‑27/64, 1‑7/16, 1‑29/64, 1‑15/32, 1‑31/64, 1‑1/2, 1‑33/64, 1‑17/32, 1‑35/64, 1‑9/16, 1‑37/64, 1‑19/32, 1‑39/64, 1‑5/8, 1‑41/64, 1‑21/32, 1‑43/64, 1‑11/16, 1‑45/64, 1‑23/32, 1‑47/64, 1‑3/4

1.3750
to
1.7500

2-1/4
(2.2525 / 2.2521)

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

H-144-16
H-144-22
H-144-28
H-144-34
H-144-40
H-144-48

2-31/64

3/8