AS568 Standard O-ring Size Chart

AS568-A Standard O-ring Size Chart

The O-ring Reference Chart below covers the AS568 O-Ring Sizes published by the Society of Automotive Engineers (S.A.E.), and includes the Extended Sizes in the 400 Series. The purpose of this chart is to specify the inside diameters, cross-sections, tolerances, and size identification codes (dash numbers) for O-rings used in sealing applications and for straight thread tube fitting boss gaskets.

Series

C/S Inches

C/S Frac.

C/S mm

ID Range

Zero

.070

1/16

1.78

.029 - 5.239"

100

.103

3/32

2.62

.049 - 9.737"

200

.139

1/8

3.53

.171 - 17.955"

300

.210

3/16

5.33

.412 - 25.940"

400

.275

1/4

6.99

1.350 - 25.940"

900

varies

1.42 - 3.0

.185 - 2.337"

Zero Series 1/16" Cross Section, .070" (1.78mm), Tolerance ± .003" (± 0.08mm)

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-001 *

1/32

3/32

1/32

.029±.004

0.74±0.10

-002 *

3/64

9/64

3/64

.042±.004

1.07±0.10

-003 *

1/16

3/16

1/16

.056±.004

1.42±0.10

-004

5/64

13/64

1/16

.070±.005

1.78±0.13

-005

3/32

7/32

1/16

.101±.005

2.57±0.13

-006

1/8

1/4

1/16

.114±.005

2.90±0.13

-007

5/32

9/32

1/16

.145±.005

3.68±0.13

-008

3/16

5/16

1/16

.179±.005

4.47±0.13

-009

7/32

11/32

1/16

.208±.005

5.28±0.13

-010

1/4

3/8

1/16

.239±.005

6.07±.013

-011

5/16

7/16

1/16

.301±.005

7.65±0.13

-012

3/8

1/2

1/16

.364±.005

9.25±0.13

-013

7/16

9/16

1/16

.426±.005

10.82±0.13

-014

1/2

5/8

1/16

.489±.005

12.42±0.13

-015

9/16

11/16

1/16

.551±.007

14.00±0.18

-016

5/8

3/4

1/16

.614±.009

15.60±0.23

-017

11/16

13/16

1/16

.676±.009

17.17±0.23

-018

3/4

7/8

1/16

.739±.009

18.77±.023

-019

13/16

15/16

1/16

.801±.009

20.35±0.23

-020

7/8

1/16

.926±.009

21.95±0.23

-021

15/16

1-1/16

1/16

.989±.010

23.52±0.23

-022

1-1/8

1/16

1.051±.010

25.12±0.25

-023

1-1/16

1-3/16

1/16

1.114±.010

26.70±0.25

-024

1-1/8

1-1/4

1/16

1.114±.010

28.30±0.25

-025

1-3/16

1-5/16

1/16

1.176±.011

29.87±0.28

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-026

1-1/4

1-3/8

1/16

1.239±.011

31.47±0.28

-027

1-5/16

1-7/16

1/16

1.301±.011

33.05±0.28

-028

1-3/8

1-1/2

1/16

1.364±.013

34.65±0.33

-029

1-1/2

1-5/8

1/16

1.486±.013

37.82±0.33

-030

1-5/8

1-3/4

1/16

1.614±.013

41.00±0.33

-031

1-3/4

1-7/8

1/16

1.739±.015

44.17±0.38

-032

1-7/8

1/16

1.864±.015

47.35±0.38

-033

2-1/8

1/16

1.989±.018

50.52±0.46

-034

2-1/8

2-1/4

1/16

2.114±.018

53.70±0.46

-035

2-1/4

2-3/8

1/16

2.239±.018

56.87±0.46

-036

2-3/8

2-1/2

1/16

2.364±.018

60.05±0.46

-037

2-1/2

2-5/8

1/16

2.489±.018

63.22±0.46

-038

2-5/8

2-3/4

1/16

2.614±.020

66.40±0.51

-039

2-3/4

2-7/8

1/16

2.739±.020

69.57±0.51

-040

2-7/8

1/16

2.864±.020

72.75±0.51

-041

3-1/8

1/16

2.989±.024

75.92±0.61

-042

3-1/4

3-3/8

1/16

3.239±.024

82.27±0.61

-043

3-1/2

3-5/8

1/16

3.489±.024

88.62±0.61

-044

3-3/4

3-7/8

1/16

3.739±.027

94.97±0.69

-045

4-1/8

1/16

3.989±.027

101.32±0.69

-046

4-1/4

4-3/8

1/16

4.239±.030

107.67±0.76

-047

4-1/2

4-5/8

1/16

4.489±.030

114.02±0.76

-048

4-3/4

4-7/8

1/16

4.739±.030

120.37±0.76

-049

5-1/8

1/16

4.989±.037

126.72±0.94

-050

5-1/4

5-3/8

1/16

5.239±.037

133.07±0.94

*Note: Cross-Section of -001 is 0.040" (1.02mm); -002 is 0.050" (1.27mm); -003 is 0.060" (1.52mm)

100 Series 3/32" Cross Section, .103" (2.62mm), Tolerance ± .003" (± 0.08mm)

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-102

1/16

1/4

3/32

.049±.005

1.24±0.13

-103

3/32

9/32

3/32

.081±.005

2.06±0.13

-104

1/8

5/16

3/32

.112±.005

2.84±0.13

-105

5/32

11/32

3/32

.143±.005

3.63±0.13

-106

3/16

3/8

3/32

.174±.005

4.42±0.13

-107

7/32

13/32

3/32

.206±.005

5.23±0.13

-108

1/4

7/16

3/32

.237±.005

6.02±0.13

-109

5/16

1/2

3/32

.299±.005

7.59±0.13

-110

3/8

9/16

3/32

.362±.005

9.19±0.13

-111

7/16

5/8

3/32

.424±.005

10.77±0.13

-112

1/2

11/16

3/32

.487±.005

12.37±0.13

-113

9/16

3/4

3/32

.549±.007

13.94±0.18

-114

5/8

11/16

3/32

.612±.009

15.54±0.23

-115

11/16

3/4

3/32

.674±.009

17.12±0.23

-116

3/4

13/16

3/32

.737±.009

18.72±0.23

-117

13/16

3/32

.799±.010

20.29±0.25

-118

7/8

1-1/16

3/32

.862±.010

21.89±0.25

-119

15/16

1-1/8

3/32

.924±.010

23.47±0.25

-120

1-3/16

3/32

.987±.010

25.07±0.25

-121

1-1/16

1-1/4

3/32

1.049±.010

26.64±0.25

-122

1-1/8

1-5/16

3/32

1.112±.010

28.24±0.25

-123

1-3/16

1-3/8

3/32

1.172±.012

29.82±0.30

-124

1-1/4

1-7/16

3/32

1.237±.012

31.42±0.30

-125

1-5/16

1-1/2

3/32

1.299±.012

32.99±0.30

-126

1-3/8

1-9/16

3/32

1.362±.012

34.59±0.30

-127

1-7/16

1-5/8

3/32

1.424±.012

36.17±0.30

-128

1-1/2

1-11/16

3/32

1.487±.012

37.77±0.30

-129

1-9/16

1-3/4

3/32

1.549±.015

39.34±0.38

-130

1-5/8

1-13/16

3/32

1.612±.015

40.94±0.38

-131

1-11/16

1-7/8

3/32

1.672±.015

42.52±0.38

-132

1-3/4

1-15/16

3/32

1.737±.015

44.12±0.38

-133

1-13/16

3/32

1.799±.015

45.69±0.38

-134

1-7/8

2-1/16

3/32

1.862±.015

47.29±0.38

-135

1-15/16

2-1/8

3/32

1.925±.017

48.90±0.43

-136

2-3/16

3/32

1.987±.017

50.47±0.43

-137

2-1/16

2-1/4

3/32

2.050±.017

52.07±0.43

-138

2-1/8

2-5/16

3/32

2.112±.017

53.64±0.43

-139

2-3/16

2-3/8

3/32

2.175±.017

55.25±0.43

-140

2-1/4

2-7/16

3/32

2.237±.017

56.82±0.43

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-141

2-5/16

2-1/2

3/32

2.300±.020

58.42±0.51

-142

2-3/8

2-9/16

3/32

2.362±.020

59.99±0.51

-143

2-7/16

2-5/8

3/32

2.425±.020

61.60±0.51

-144

2-1/2

2-11/16

3/32

2.487±.020

63.17±0.51

-145

2-9/16

2-3/4

3/32

2.550±.020

64.77±0.51

-146

2-5/8

2-13/16

3/32

2.612±.020

66.34±0.51

-147

2-11/16

2-7/8

3/32

2.675±.022

67.92±0.56

-148

2-3/4

2-15/16

3/32

2.737±.022

69.52±0.56

-149

2-13/16

3/32

2.800±.022

71.12±0.56

-150

2-7/8

3-1/16

3/32

2.862±.022

72.69±0.56

-151

3-3/16

3/32

2.987±.024

75.87±0.61

-152

3-1/4

3-7/16

3/32

3.237±.024

82.22±0.61

-153

3-1/2

3-11/16

3/32

3.487±.024

88.57±0.61

-154

3-3/4

3-15/16

3/32

3.737±.028

94.92±0.71

-155

4-3/16

3/32

3.987±.028

101.27±0.71

-156

4-1/4

4-7/16

3/32

4.237±.030

107.62±0.76

-157

4-1/2

4-11/16

3/32

4.487±.030

113.97±0.76

-158

4-3/4

4-15/16

3/32

4.737±.030

120.32±0.76

-159

5-3/16

3/32

4.987±.035

126.67±0.89

-160

5-1/4

5-7/16

3/32

5.237±.035

133.02±0.89

-161

5-1/2

5-11/16

3/32

5.487±.035

139.37±0.89

-162

5-3/4

5-15/16

3/32

5.737±.035

145.72±0.89

-163

6-3/16

3/32

5.987±.035

152.07±0.89

-164

6-1/4

6-7/16

3/32

6.237±.040

158.42±1.02

-165

6-1/2

6-11/16

3/32

6.487±.040

164.77±1.02

-166

6-3/4

6-15/16

3/32

6.737±.040

171.12±1.02

-167

7-3/16

3/32

6.987±.040

177.47±1.02

-168

7-1/4

7-7/16

3/32

7.237±.045

189.82±1.14

-169

7-1/2

7-11/16

3/32

7.487±.045

190.17±1.14

-170

7-3/4

7-15/16

3/32

7.737±.045

196.52±1.14

-171

8-3/16

3/32

7.987±.045

202.87±1.14

-172

8-1/4

8-7/16

3/32

8.237±.050

209.22±1.27

-173

8-1/2

8-11/16

3/32

8.487±.050

215.57±1.27

-174

8-3/4

8-15/16

3/32

8.737±.050

221.92±1.27

-175

9-3/16

3/32

8.987±.050

228.27±1.27

-176

9-1/4

9-7/16

3/32

9.237±.055

234.62±1.40

-177

9-1/2

9-11/16

3/32

9.487±.055

240.97±1.40

-178

9-3/4

9-15/16

3/32

9.737±.055

247.32±1.40

200 Series 1/8" Cross Section, .139" (3.53mm), Tolerance ± .004" (± 0.10mm)

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-201

3/16

7/16

1/8

.171±.005

4.34±0.13

-202

1/4

1/2

1/8

.234±.005

5.94±0.13

-203

5/16

9/16

1/8

.396±.005

7.52±0.13

-204

3/8

5/8

1/8

.359±.005

9.12±0.13

-205

7/16

11/16

1/8

.421±.005

10.69±0.13

-206

1/2

3/4

1/8

.484±.005

12.29±0.13

-207

9/16

13/16

1/8

.546±.007

13.87±0.18

-208

5/8

7/8

1/8

.609±.009

15.47±0.23

-209

11/16

15/16

1/8

.671±.009

17.04±0.23

-210

3/4

1/8

.734±.010

18.64±0.35

-211

13/16

1-1/16

1/8

.796±.010

20.22±0.35

-212

7/8

1-1/8

1/8

.859±.010

21.82±0.35

-213

15/16

1-3/16

1/8

.921±.010

23.39±0.35

-214

1-1/4

1/8

.984±.010

24.99±0.35

-215

1-1/16

1-5/16

1/8

1.046±.010

26.57±0.35

-216

1-1/8

1-3/8

1/8

1.109±.012

28.17±0.30

-217

1-3/16

1-7/16

1/8

1.171±.012

29.74±0.30

-218

1-1/4

1-1/2

1/8

1.234±.012

31.34±0.30

-219

1-5/16

1-9/16

1/8

1.296±.012

32.92±0.30

-220

1-3/8

1-5/8

1/8

1.359±.012

34.52±0.30

-221

1-7/16

1-11/16

1/8

1.421±.012

36.09±0.30

-222

1-1/2

1-3/4

1/8

1.484±.015

37.69±0.30

-223

1-5/8

1-7/8

1/8

1.6009±.015

40.87±0.30

-224

1-3/4

1/8

1.734±.015

44.04±0.30

-225

1-7/8

2-1/8

1/8

1.859±.018

47.22±0.46

-226

2-1/4

1/8

1.984±.018

50.39±0.46

-227

2-1/8

2-3/8

1/8

2.109±.018

53.57±0.46

-228

2-1/7

2-1/2

1/8

2.234±.020

56.74±0.51

-229

2-3/8

2-5/8

1/8

2.359±.020

59.92±0.51

-230

2-1/2

2-3/4

1/8

2.484±.020

63.09±0.51

-231

2-5/8

2-7/8

1/8

2.609±.020

66.27±0.51

-232

2-3/4

1/8

2.734±.024

69.44±0.61

-233

2-7/8

3-1/8

1/8

2.859±.024

72.62±0.61

-234

3-1/4

1/8

2.984±.024

75.79±0.61

-235

3-1/8

3-3/8

1/8

3.109±.024

78.97±0.61

-236

3-1/4

3-1/2

1/8

3.234±.024

82.14±0.61

-237

3-3/8

3-5/8

1/8

3.359±.024

85.32±0.61

-238

3-1/2

3-3/4

1/8

3.484±.024

88.49±0.61

-239

3-5/8

3-7/8

1/8

3.609±.028

91.67±0.71

-240

3-3/4

1/8

3.734±.028

94.84±0.71

-241

3-7/8

4-1/8

1/8

3.859±.028

98.02±0.71

-242

4-1/4

1/8

3.984±.028

101.19±0.71

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-243

4-1/8

4-3/8

1/8

4.109±.028

104.37±0.71

-244

4-1/4

4-1/2

1/8

4.234±.030

107.54±0.76

-245

4-3/8

4-5/8

1/8

4.359±.030

110.72±0.76

-246

4-1/2

4-3/4

1/8

4.484±.030

113.89±0.76

-247

4-5/8

4-7/8

1/8

4.609±.030

117.07±0.76

-248

4-3/4

1/8

4.734±.030

120.24±0.76

-249

4-7/8

5-1/8

1/8

4.859±.035

123.42±0.89

-250

5-1/4

1/8

4.984±.035

126.59±0.89

-251

5-1/8

5-3/8

1/8

5.109±.035

129.77±0.89

-252

5-1/4

5-1/2

1/8

5.234±.035

132.94±0.89

-253

5-3/8

5-5/8

1/8

5.359±.035

136.12±0.89

-254

5-1/2

5-3/4

1/8

5.484±.035

139.29±0.89

-255

5-5/8

5-7/8

1/8

5.609±.035

142.47±0.89

-256

5-3/4

1/8

5.732±.035

145.64±0.89

-257

5-7/8

6-1/8

1/8

5.859±.035

148.82±0.89

-258

6-1/4

1/8

5.984±.035

151.99±0.89

-259

6-1/4

6-1/2

1/8

6.234±.040

158.34±1.02

-260

6-1/2

6-3/4

1/8

6.484±.040

164.69±1.02

-261

6-3/4

1/8

6.734±.040

171.04±1.02

-262

7-1/4

1/8

6.984±.040

177.39±1.02

-263

7-1/4

7-1/2

1/8

7.234±.045

183.74±1.14

-264

7-1/2

7-3/4

1/8

7.484±.045

190.09±1.14

-265

7-3/4

1/8

7.734±.045

196.44±1.14

-266

8-1/4

1/8

7.984±.045

202.79±1.14

-267

8-1/4

8-1/2

1/8

8.234±.050

209.14±1.27

-268

8-1/2

8-3/4

1/8

8.484±.050

215.49±1.27

-269

8-3/4

1/8

8.732±.050

221.84±1.27

-270

9-1/4

1/8

8.984±.050

228.19±1.27

-271

9-1/4

9-1/2

1/8

9.234±.055

234.54±1.40

-272

9-1/2

9-3/4

1/8

9.484±.055

240.89±1.40

-273

9-3/4

1/8

9.732±.055

247.24±1.40

-274

10-1/4

1/8

9.984±.055

253.59±1.40

-275

10-1/2

10-3/4

1/8

10.484±.055

266.29±1.40

-276

11-1/4

1/8

10.984±.065

278.99±1.65

-277

11-1/2

11-3/4

1/8

11.484±.065

291.69±1.65

-278

12-1/4

1/8

11.984±.065

301.39±1.65

-279

13-1/4

1/8

12.984±.065

329.79±1.65

-280

14-1/4

1/8

13.984±.065

355.19±1.65

-281

15-1/4

1/8

14.984±.065

380.59±1.65

-282

16-1/4

1/8

15.955±.075

405.26±1.91

-283

17-1/4

1/8

16.955±.080

430.66±2.03

-284

18-1/4

1/8

17.955±.080

456.06±2.16

300 Series 3/16" Cross Section, .210" (5.33mm), Tolerance ± .005" (± 0.13mm)

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-309

7/16

13/16

3/16

.412±.005

10.46±0.13

-310

1/2

7/8

3/16

.475±.005

12.07±0.13

-311

9/16

15-16

3/16

.537±.007

13.64±0.18

-312

5/8

3/16

.600±.009

15.24±0.23

-313

11/16

1-1/16

3/16

.662±.009

16.81±0.23

-314

3/4

1-1/8

3/16

.725±.010

18.42±0.25

-315

13/16

1-3/16

3/16

.787±.010

19.99±0.25

-316

7/8

1-1/4

3/16

.850±.010

21.59±0.25

-317

15/16

1-5/16

3/16

.912±.010

23.16±0.25

-318

1-3/8

3/16

.975±.010

24.77±0.25

-319

1-1/16

1-7/16

3/16

1.037±.010

26.34±0.25

-320

1-1/8

1-1/2

3/16

1.100±.012

27.94±0.30

-321

1-3/16

1-9/16

3/16

1.162±.012

29.51±0.30

-322

1-1/4

1-5/8

3/16

1.225±.012

31.12±0.30

-323

1-5/16

1-11/16

3/16

1.287±.012

32.69±0.30

-324

1-3/8

1-3/4

3/16

1.350±.012

34.29±0.30

-325

1-1/2

1-7/8

3/16

1.475±.015

37.47±0.38

-326

1-5/8

3/16

1.600±.015

40.64±0.38

-327

1-3/4

2-1/8

3/16

1.725±.015

43.82±0.38

-328

1-7/8

2-1/4

3/16

1.850±.015

46.99±0.38

-329

2-3/8

3/16

1.975±.018

50.17±0.46

-330

2-1/8

2-1/2

3/16

2.100±.018

53.34±0.46

-331

2-1/4

2-5/8

3/16

2.225±.018

56.52±0.46

-332

2-3/8

2-3/4

3/16

2.350±.018

59.69±0.46

-333

2-1/2

2-7/8

3/16

2.475±.020

62.87±0.51

-334

2-5/8

3/16

2.600±.020

66.04±0.51

-335

2-3/4

3-1/8

3/16

2.725±.020

69.22±0.51

-336

2-7/8

3-1/4

3/16

2.850±.020

72.39±0.51

-337

3-3/8

3/16

2.975±.024

75.57±0.61

-338

3-1/8

3-1/2

3/16

3.100±.024

78.74±0.61

-339

3-1/4

3-5/8

3/16

3.225±.024

81.92±0.61

-340

3-3/8

3-3/4

3/16

3.350±.024

85.09±0.61

-341

3-1/2

3-7/8

3/16

3.475±.024

88.27±0.61

-342

3-5/8

3/16

3.600±.028

91.44±0.71

-343

3-3/4

4-1/8

3/16

3.725±.028

94.62±0.71

-344

3-7/8

4-1/4

3/16

3.850±.028

97.79±0.71

-345

4-3/8

3/16

3.975±.028

100.97±0.71

-346

4-1/8

4-1/2

3/16

4.100±.028

104.14±0.71

-347

4-1/4

4-5/8

3/16

4.225±.030

107.32±0.76

-348

4-3/8

4-3/4

3/16

4.350±.030

110.49±0.76

-349

4-1/2

4-7/8

3/16

4.475±.030

113.67±0.76

-350

4-5/8

3/16

4.600±.030

116.84±0.76

-351

4-3/4

5-1/8

3/16

4.725±.030

120.02±0.76

-352

4-7/8

5-1/4

3/16

4.850±.030

123.19±0.76

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-353

5-3/8

3/16

4.975±.037

126.37±0.94

-354

5-1/8

5-1/2

3/16

5.100±.037

129.54±0.94

-355

5-1/4

5-5/8

3/16

5.225±.037

132.72±0.94

-356

5-3/8

5-3/4

3/16

5.350±.037

135.89±0.94

-357

5-1/2

5-7/8

3/16

5.475±.037

139.07±0.94

-358

5-5/8

3/16

5.600±.037

142.24±0.94

-359

5-3/4

6-1/8

3/16

5.725±.037

145.42±0.94

-360

5-7/8

6-1/4

3/16

5.850±.037

148.59±0.94

-361

6-3/8

3/16

5.975±.037

151.77±0.94

-362

6-1/4

6-5/8

3/16

6.225±.040

158.12±1.02

-363

6-1/2

6-7/8

3/16

6.475±.040

164.47±1.02

-364

6-3/4

7-1/8

3/16

6.725±.040

170.82±1.02

-365

7-3/8

3/16

6.975±.040

177.17±1.02

-366

7-1/4

7-5/8

3/16

7.225±.045

183.52±1.14

-367

7-1/2

7-7/8

3/16

7.475±.045

189.87±1.14

-368

7-3/4

8-1/8

3/16

7.725±.045

196.22±1.14

-369

8-3/8

3/16

7.975±.045

202.57±1.14

-370

8-1/4

8-5/8

3/16

8.225±.050

208.92±1.27

-371

8-1/2

8-7/8

3/16

8.475±.050

215.27±1.27

-372

8-3/4

9-1/8

3/16

8.725±.050

221.62±1.27

-373

9-3/8

3/16

8.975±.050

227.97±1.27

-374

9-1/4

9-5/8

3/16

9.225±.055

234.32±1.40

-375

9-1/2

9-7/8

3/16

9.475±.055

240.67±1.40

-376

9-3/4

10-1/8

3/16

9.725±.055

247.02±1.40

-377

10-3/8

3/16

9.975±.055

253.37±1.40

-378

10-1/2

10-7/8

3/16

10.475±.060

266.07±1.52

-379

11-3/8

3/16

10.975±.060

278.77±1.52

-380

11-1/2

11-7/8

3/16

11.475±.065

291.47±1.65

-381

12-3/8

3/16

11.975±.065

304.17±1.65

-382

13-3/8

3/16

12.975±.065

329.57±1.65

-383

14-3/8

3/16

13.975±.070

354.97±1.78

-384

15-3/8

3/16

14.975±.070

380.37±1.78

-385

16-3/8

3/16

15.955±.075

405.26±1.91

-386

17-3/8

3/16

16.955±.080

430.66±2.03

-387

18-3/8

3/16

17.955±.085

456.06±2.16

-388

19-3/8

3/16

18.955±.090

481.46±2.29

-389

20-3/8

3/16

19.955±.095

506.86±2.41

-390

21-3/8

3/16

20.955±.095

532.26±2.41

-391

22-3/8

3/16

21.955±.095

557.66±2.41

-392

23-3/8

3/16

22.940±.105

582.68±2.67

-393

24-3/8

3/16

23.940±.110

608.08±2.79

-394

25-3/8

3/16

24.940±.115

633.48±2.92

-395

26-3/8

3/16

25.940±.120

658.88±3.05

400 Series 1/4" Cross Section, .275" (6.99mm), Tolerance ± .006" (± 0.15mm)

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-400

1-3/8

1-7/8

1/4

1.350±.012

34.29±0.31

-401

1-1/2

1/4

1.475±.015

37.46±0.38

-402

1-5/8

2-1/8

1/4

1.600±.015

40.64±0.38

-403

1-3/4

2-1/4

1/4

1.725±.015

43.81±0.38

-404

1-7/8

2-3/8

1/4

1.850±.015

46.99±0.38

-405

2-1/2

1/4

1.975±.018

50.16±0.46

-406

2-1/8

2-5/8

1/4

2.100±.018

53.34±0.46

-407

2-1/4

2-3/4

1/4

2.225±.018

56.51±0.46

-408

2-3/8

2-7/8

1/4

2.350±.018

59.69±0.46

-409

2-1/2

1/4

2.475±.020

62.86±0.51

-410

2-5/8

3-1/8

1/4

2.600±.020

66.04±0.51

-411

2-3/4

3-1/4

1/4

2.725±.020

69.21±0.51

-412

2-7/8

3-3/8

1/4

2.850±.020

72.39±0.51

-413

3-1/2

1/4

2.975±.024

75.56±0.61

-414

3-1/8

3-5/8

1/4

3.100±.024

78.74±0.61

-415

3-1/4

3-3/4

1/4

3.225±.024

81.91±0.61

-416

3-3/8

3-7/8

1/4

3.350±.024

85.09±0.61

-417

3-1/2

1/4

3.475±.024

88.26±0.61

-418

3-5/8

4-1/8

1/4

3.600±.028

91.44±0.71

-419

3-3/4

4-1/4

1/4

3.725±.028

94.61±0.71

-420

3-7/8

4-3/8

1/4

3.850±.028

97.79±0.71

-421

4-1/2

1/4

3.975±.028

100.96±0.71

-422

4-1/8

4-5/8

1/4

4.100±.028

104.14±0.71

-423

4-1/4

4-3/4

1/4

4.225±.030

107.31±0.76

-424

4-3/8

4-7/8

1/4

4.350±.030

110.49±0.76

-425

4-1/2

1/4

4.475±.033

113.67±0.84

-426

4-5/8

5-1/8

1/4

4.600±.033

116.84±0.84

-427

4-3/4

5-1/4

1/4

4.725±.033

120.02±0.84

-428

4-7/8

5-3/8

1/4

4.850±.033

123.19±0.84

-429

5-1/2

1/4

4.975±.037

126.37±0.94

-430

5-1/8

5-5/8

1/4

5.100±.037

129.54±0.94

-431

5-1/4

5-3/4

1/4

5.225±.037

132.72±0.94

-432

5-3/8

5-7/8

1/4

5.350±.037

135.89±0.94

-433

5-1/2

1/4

5.475±.037

139.07±0.94

-434

5-5/8

6-1/8

1/4

5.600±.037

142.24±0.94

-435

5-3/4

6-1/4

1/4

5.725±.037

145.42±0.94

-436

5-7/8

6-3/8

1/4

5.850±.037

148.59±0.94

-437

6-1/2

1/4

5.975±.037

151.77±0.94

AS568

Nominal Reference

Actual Dimensions

Number

ID (in)

ID (mm)

-438

6-1/4

6-3/4

1/4

6.225±.040

158.12±1.02

-439

6-1/2

1/4

6.475±.040

164.47±1.02

-440

6-3/4

7-1/4

1/4

6.725±.040

170.82±1.02

-441

7-1/2

1/4

6.975±.040

177.17±1.02

-442

7-1/4

7-3/4

1/4

7.225±.045

183.52±1.14

-443

7-1/2

1/4

7.475±.045

189.87±1.14

-444

7-3/4

8-1/4

1/4

7.725±.045

196.22±1.14

-445

8-1/2

1/4

7.975±.045

202.57±1.14

-446

8-1/2

1/4

8.475±.055

215.27±1.40

-447

9-1/2

1/4

8.975±.055

227.97±1.40

-448

9-1/2

1/4

9.475±.055

240.67±1.40

-449

10-1/2

1/4

9.975±.055

253.37±1.40

-450

10-1/2

1/4

10.475±.060

266.07±1.52

-451

11-1/2

1/4

10.975±.060

278.77±1.52

-452

11-1/2

1/4

11.475±.060

291.47±1.52

-453

12-1/2

1/4

11.975±.060

304.17±1.52

-454

12-1/2

1/4

12.475±.060

316.87±1.52

-455

13-1/2

1/4

12.975±.060

329.57±1.52

-456

13-1/2

1/4

13.475±.070

342.27±1.78

-457

14-1/2

1/4

13.975±.070

354.97±1.78

-458

14-1/2

1/4

14.475±.070

367.67±1.78

-459

15-1/2

1/4

14.975±.070

380.37±1.78

-460

15-1/2

1/4

15.475±.070

393.07±1.78

-461

16-1/2

1/4

15.955±.075

405.26±1.91

-462

16-1/2

1/4

16.455±.075

417.96±1.91

-463

17-1/2

1/4

16.955±.080

430.66±2.03

-464

17-1/2

1/4

17.455±.085

443.36±2.16

-465

18-1/2

1/4

17.955±.085

456.06±2.16

-466

18-1/2

1/4

18.455±.085

468.76±2.16

-467

19-1/2

1/4

18.955±.090

481.46±2.29

-468

19-1/2

1/4

19.455±.090

494.16±2.29

-469

20-1/2

1/4

19.955±.095

506.86±2.41

-470

21-1/2

1/4

20.955±.095

532.26±2.41

-471

22-1/2

1/4

21.955±.100

557.66±2.54

-472

23-1/2

1/4

22.940±.105

582.68±2.67

-473

24-1/2

1/4

23.940±.110

608.08±2.79

-474

25-1/2

1/4

24.940±.115

633.48±2.92

-475

26-1/2

1/4

25.940±.120

658.88±3.05

900 Series O-Ring Boss Gaskets for Straight Thread Tube Fittings

AS568

Tube Size

Actual Dimensions

Tube Size

Number

Dash #

ID (in)

CS (in)

ID (mm)

CS (mm)

OD (mm)

-901

3/32

.185±.005

.056±.003

4.70±0.13

1.42±0.08

2.38

-902

1/8

.239±.005

.064±.003

6.07±0.13

1.63±0.08

3.18

-903

3/16

.301±.005

.064±.003

7.65±0.13

1.63±0.08

4.76

-904

1/4

.351±.005

.072±.003

8.92±0.13

1.83±0.08

6.35

-905

5/16

.414±.005

.072±.003

10.52±0.13

1.83±0.08

7.94

-906

3/8

.468±.005

.078±.003

11.89±0.13

1.98±0.08

9.53

-907

7/16

.530±.007

.082±.003

13.46±0.18

2.08±0.08

11.11

-908

1/2

.644±.009

.087±.003

16.36±0.23

2.21±0.08

12.70

-909

9/16

.706±.009

.097±.003

17.93±0.23

2.46±0.08

14.29

-910

5/8

.755±.009

.097±.003

19.18±0.23

2.46±0.08

15.88

-911

11/16

.863±.009

.116±.004

21.92±0.23

2.95±0.10

17.46

-912

3/4

.924±.009

.116±.004

23.47±0.23

2.95±0.10

19.05

-913

13/16

.986±.010

.116±.004

25.04±0.25

2.95±0.10

20.64

-914

7/8

1.047±.010

.116±.004

26.59±0.25

2.95±0.10

22.23

-916

1.171±.010

.116±.004

29.74±0.25

2.95±0.10

25.40

-918

1-1/8

1.355±.012

.116±.004

34.42±0.30

2.95±0.10

28.58

-920

1-1/4

1.475±.014

.118±.004

37.47±0.36

3.00±0.10

31.75

-924

1-1/2

1.720±.014

.118±.004

43.69±0.36

3.00±0.10

38.10

-928

1-3/4

2.090±.018

.118±.004

53.09±0.46

3.00±0.10

44.45

-932

2.337±.018

.118±.004

59.36±0.47

3.00±0.10

50.80

About Us

From our very beginning we realized that no single product line would be adequate for the many different needs of the markets we serve so we have continued to expand and broaden our product line and production capabilities to effectively serve these markets.

Increase Your Productivity

Every company strives to reduce cost and increase productivity and we're no different. We strive to do it in house and for your organization as well by offering an extensive product line for quick access to a full line of rubber products from a single source.

In addition to our extensive product line, we also offer a variety of post production services that can greatly help you improve you operation's efficiency and free up your staff to focus on your operation. Our services include, die cutting, slitting, kitting, packaging, assembly, bonding, sheeting, vulcanizing and more.

Regional Rubber Company

1701 Oakbrook Dr. Suite C

Norcross, GA 30093

Phone: 770-736-0332

E-mail: info@regionalrubber.com

REGIONAL RUBBER(C) 2026 | PRIVACY POLICY
1701-C OAKBROOK DR., NORCROSS, GA 30093