SIZE TOLERANCE COMPARISON CHART

MIL-STD 413C

Seal Ring AS871A

RMA Handbook (surface imperfections)

Oring AS568B (size only)

ISO 3601

Category A - Military and Critical Applications

Grade S - Special (aerospace)

Size Tol.

Customer Driven

See chart AS568

See chart ISO 3601-1

Flash Extension/P.L. Projection

Material Cross Section

Max.

Material Cross Section

Max.

Maximum Acceptable Dim.

Material Cross Section

Max.

Less than 0.100"

0.003"

All

0.003"

Category "A"

All

0.003"

0.100" to 0.134"

0.003"

Material Cross Section

Max.

0.135" to 0.204"

0.004"

Less than 0.100"

0.003"

0.205" to 0.268"

0.005"

0.100" to 0.134"

0.003"

0.269 and over

0.006"

0.135" to 0.204"

0.004"

0.205" to 0.268"

0.005"

0.269" to 0.281"

0.006"

Flash Thickness

0.005"

Off register/Mismatch

Material Cross Section

Max.

0.003"

Maximum Acceptable Dim.

Less than 0.100"

0.003"

Category "A"

Grade S

0.100" to 0.134"

0.004"

Material Cross Section

Max.

Material Cross Section

Max.

0.135" to 0.204"

0.005"

Less than 0.100"

0.003"

1.8 mm

0.08 mm

0.205" to 0.268"

0.006"

0.100" to 0.134"

0.004"

2.65 mm

0.08 mm

0.269 and over

0.006"

0.135" to 0.204"

0.005"

3.55 mm

0.10 mm

0.205" to 0.268"

0.006"

5.3 mm

0.12 mm

0.269" to 0.281"

0.006"

7.0 mm

0.13 mm

Combined Flash, Offset and Parting Line Projection

Maximum Acceptable Dim.

Grade S

Material Cross Section

Max.

1.8 mm

0.10 mm

2.65 mm

0.10 mm

3.55 mm

0.13 mm

5.3 mm

0.15 mm

7.0 mm

0.15 mm

DEFECT TOLERANCE COMPARISON CHART

MIL-STD 413C

Seal Ring AS871A

RMA Handbook (surface imperfections)

Oring AS568B (size only)

ISO 3601

Flats

max. 0.003" (except at min. MCS)

Departure from a circular cross-section due to trimming is allowed provided that the resultant surface is smoothly blended and is within the size tolerance limits for cross section ISO 3601-1

Backrind

Maximum Acceptable Dim.

None

Maximum Acceptable Dim.

Material Cross Section

Depth

Width

Category "A"

Grade S

Less than 0.100"

Material Cross Section

Depth

Width

Material Cross Section

Depth

Width

0.100" to 0.134"

0.003"

0.005"

Less than 0.100"

1.8 mm

0.05 mm

0.10 mm

0.135" to 0.204"

0.004"

0.006"

0.100" to 0.134"

0.003"

0.005"

2.65 mm

0.08 mm

0.15 mm

0.205" to 0.268"

0.004"

0.006"

0.135" to 0.268"

0.004"

0.006"

3.55 mm

0.10 mm

0.20 mm

0.269 and over

0.005"

0.010'

0.269" to 0.281"

0.005"

0.010"

5.3 mm

0.10 mm

0.20 mm

7.0 mm

0.13 mm

0.30 mm

P.L. Indentation

Maximum Acceptable Dim.

Material Cross Section

Depth

Width

Material Cross Section

Depth

Width or Length

Category "A"

Grade S

Less than 0.100"

0.003"

0.010"

<= 0.070"

0.002"

0.003"

Material Cross Section

Depth

Width

Material Cross Section

Depth

Width

0.100" to 0.134"

0.003"

0.015"

0.070 <= 0.103"

0.003"

0.005"

Less than 0.100"

0.003"

0.010"

1.8 mm

0.08 mm

0.15 mm

0.135" to 0.204"

0.004"

0.020"

0.103" <= 0.139"

0.004"

0.007"

0.100" to 0.134"

0.003"

0.015"

2.65 mm

0.08 mm

0.25 mm

0.205" to 0.268"

0.005"

0.025"

0.139" <= 0.210"

0.005"

0.010"

0.135" to 0.204"

0.004"

0.020"

3.55 mm

0.10 mm

0.40 mm

0.269 and over

0.006"

0.030'

0.210" <

0.006"

0.015"

0.205" to 0.268"

0.005"

0.025"

5.3 mm

0.10 mm

0.63 mm

Not more than 1 defect per inch of circumference

0.269" to 0.281"

0.006"

0.030"

7.0 mm

0.13 mm

1.00 mm

Foreign Material

Maximum Acceptable Dim.

Not Permitted

Material Cross Section

Depth

Width

Category "A"

Less than 0.100"

Material Cross Section

Depth

Width

0.100" to 0.134"

0.003"

0.005"

Less than 0.100"

Non Visible

0.135" to 0.204"

0.004"

0.007"

0.100" to 0.134"

0.003"

0.005"

0.205" to 0.268"

0.005"

0.010"

0.135" to 0.204"

0.004"

0.007"

0.269 and over

0.006"

0.015"

0.205" to 0.268"

0.005"

0.010"

0.269" to 0.281"

0.006"

0.015"

Inclusions

Maximum Acceptable Dim.

(depression left from foreign material)

Material Cross Section

Depth

Width or Length

<= 0.070"

0.002"

0.003"

0.070 <= 0.103"

0.003"

0.005"

0.103" <= 0.139"

0.004"

0.007"

0.139" <= 0.210"

0.005"

0.010"

0.210" <

0.006"

0.015"

Not more than 1 defect per inch of circumference

Indentations

Maximum Acceptable Dim.

Material Cross Section

Depth

Width or Length

Grade S

<= 0.070"

0.002"

0.003"

Material Cross Section

Depth

Width

0.070 <= 0.103"

0.003"

0.005"

1.8 mm

0.08 mm

0.15 mm

0.103" <= 0.139"

0.004"

0.007"

2.65 mm

0.08 mm

0.25 mm

0.139" <= 0.210"

0.005"

0.010"

3.55 mm

0.10 mm

0.40 mm

0.210" <

0.006"

0.015"

5.3 mm

0.10 mm

0.63 mm

Not more than 1 defect per inch of circumference

7.0 mm

0.13 mm

1.00 mm

Non Fill

Maximum Acceptable Dim.

Material Cross Section

Depth

Width

Material Cross Section

Depth

Width or Length

Category "A"

Grade S

Less than 0.100"

<= 0.070"

0.002"

0.005"

Material Cross Section

Depth

Width

Material Cross Section

Depth

Width

0.100" to 0.134"

0.002"

0.010"

0.070 <= 0.103"

0.003"

0.010"

Less than 0.100"

None

1.8 mm

0.08 mm

0.15 mm

0.135" to 0.204"

0.003"

0.015"

0.103" <= 0.139"

0.004"

0.015"

0.100" to 0.134"

0.002"

0.010"

2.65 mm

0.08 mm

0.25 mm

0.205" to 0.268"

0.003"

0.025"

0.139" <= 0.210"

0.005"

0.020"

0.135" to 0.204"

0.003"

0.015"

3.55 mm

0.10 mm

0.40 mm

0.269 and over

0.003"

0.040"

0.210" <

0.006"

0.030"

0.205" to 0.268"

0.003"

0.025"

5.3 mm

0.10 mm

0.63 mm

Not more than 1 defect per inch of circumference

0.269" to 0.281"

0.003"

0.040"

7.0 mm

0.13 mm

1.00 mm

Mold Deposit Defects

Maximum Acceptable Dim.

(Indentations)

Material Cross Section

Depth

Width

Material Cross Section

Depth

Width or Length

Category "A"

Less than 0.100"

0.003"

0.010"

<= 0.070"

0.002"

0.005"

Material Cross Section

Depth

Width

0.100" to 0.134"

0.003"

0.015"

0.070 <= 0.103"

0.003"

0.010"

Less than 0.100"

0.003"

0.010"

0.135" to 0.204"

0.004"

0.020"

0.103" <= 0.139"

0.004"

0.015"

0.100" to 0.134"

0.003"

0.015"

0.205" to 0.268"

0.004"

0.025"

0.139" <= 0.210"

0.005"

0.020"

0.135" to 0.204"

0.004"

0.020"

0.269 and over

0.005"

0.030"

0.210" <

0.006"

0.030"

0.205" to 0.268"

0.004"

0.025"

Not more than 1 defect per inch of circumference

0.269" to 0.281"

0.005"

0.030"

Flow Marks

Maximum Acceptable Dim.

Material Cross Section

Depth

Length

Material Cross Section

Depth

Width

Length

Category "A"

Grade S

Less than 0.100"

0.002"

0.060"

<0.139"

0.002"

0.060"

Material Cross Section

Depth

Long

Material Cross Section

Depth

Length

0.100" to 0.134"

0.002"

0.060"

>= 0.139"

0.002"

0.180"

Less than 0.135"

0.002"

0.060"

0.03 x ID or value indicated below

0.135" to 0.204"

0.002"

0.180"

Not more than 1 defect per 2 inches of circumference

0.135" and over

0.002"

0.180"

1.8 mm

0.05 mm

1.50 mm

0.205" to 0.268"

0.002"

0.180"

2.65 mm

0.05 mm

1.50 mm

0.269 and over

0.002"

0.180"

3.55 mm

0.05 mm

5.00 mm

5.3 mm

0.05 mm

5.00 mm

7.0 mm

0.05 mm

5.00 mm