Standard Spring Dimension Tolerances for Custom and Stock Springs

At Acxess Spring we aim to manufacture your custom springs with precision as there are certain standard industry tolerances that must be adhered to. Below you will find a list of all the standard tolerances for compression springs, extension springs, torsion springs, garter springs, and conical and barrel springs.

Standard Compression Spring Tolerances

coil compression spring dimensions standard tolerances

Outer/Inner Diameter Tolerances

  • 0.025” to 0.050” ± 0.002”
  • 0.051” to 0.100” ± 0.003”
  • 0.101” to 0.250” ± 0.005”
  • 0.251” to 0.500” ± 0.008”
  • 0.501” to 0.850” ± 0.015”
  • 0.851” to 1.125” ± 0.020”
  • 1.126” to 1.250” ± 0.025”
  • 1.251” to 1.480” ± 0.030”
  • 1.481” to 1.750” ± 0.040”
  • 1.751” to 2.000” ± 0.055”
  • 2.001” to 2.250” ± 0.065”
  • 2.251” to 2.500” ± 0.075”
  • 2.501” to 2.750” ± 0.090”
  • 2.751” to 3.000”± 0.115”
  • 3.001” to 3.500” ± 0.130”
  • 3.501” to 4.000” ± 0.160”
  • 4.001” to 4.500” ± 0.190”
  • 4.501” to 5.000” ± 0.225”
  • 5.001” to 5.500” ± 0.250”
  • 5.501” to 6.000” ± 0.280”
  • 6.001” to 6.500” ± 0.310”
  • 6.501” to 7.000” ± 0.350”
  • 7.001” to 7.500” ± 0.385”
  • 7.501” to 8.000” ± 0.415”
  • 8.001” to 8.500” ± 0.455”
  • 8.501” to 9.000” ± 0.490”
  • 9.001” to 9.500” ± 0.525”
  • 9.501” to 10.000” ± 0.565”

Wire Diameter Tolerances

Note: Acxess Spring does not manufacture the wire used to manufacture springs.

The following tolerances apply for the following wire types:

  • Hard Drawn HD A679
  • Hard Drawn ASTM A227
  • Music Wire ASTM A228
  • Oil Tempered MB A229
  • Carbon Valve A230
  • Phosphor Bronze Grade A B159
  • Beryllium Copper B197
  • Stainless Steel 17-7 ASTM A313
  • Stainless Steel 302 ASTM A313
  • Stainless Steel 316 ASTM A316
  • 0.005” to 0.018” ± 0.0005”
  • 0.019” to 0.040” ± 0.0006”
  • 0.041” to 0.0625” ± 0.0007”
  • 0.063” to 0.090” ± 0.0008”
  • 0.091” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”

The following tolerances apply for the following wire types:

  • Chrome Silicon A401
  • 5160 H
  • 0.100” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”
  • 0.626” to 0.750” ± 0.0016”
  • 0.751” to 1.250” ± 0.0017”

Free Length Tolerances

  • 0.001” to 0.500” ± 0.015”
  • 0.501” to 1.000” ± 0.025”
  • 1.001” to 2.000” ± 0.035”
  • 2.001” to 4.000” ± 0.050”
  • 4.001” to 8.000” ± 0.125”
  • 8.001” to 10.000” ± 0.200”
  • 10.001” to 15.000” ± 0.300”
  • 15.001” to 20.000” ± 0.400”
  • 20.001” to 25.000” ± 0.550”
  • 25.001” to 30.000” ± 0.700”
  • 30.001” to 35.000” ± 0.900”
  • 35.001” to 40.000” ± 1.100”
  • 40.001” to 48.000” ± 1.250”

Total Coils Tolerances

±¼ coil or reference if load or rate needs to be met.

Solid Height Tolerances

±7% or reference if load or rate needs to be met.

Rate Tolerances

Spring rate has a manufacturing tolerance of ±10%

Working Loads Tolerance

Working loads has a manufacturing tolerance of ±10%

Outer/Inner Diameter Tolerances

  • 0.040” to 0.050” ± 0.002”
  • 0.051” to 0.100” ± 0.003”
  • 0.101” to 0.250” ± 0.005”
  • 0.251” to 0.500” ± 0.008”
  • 0.501” to 0.850” ± 0.015”
  • 0.851” to 1.125” ± 0.020”
  • 1.126” to 1.250” ± 0.025”
  • 1.251” to 1.480” ± 0.030”
  • 1.481” to 1.750” ± 0.040”
  • 1.751” to 2.000” ± 0.055”
  • 2.001” to 2.250” ± 0.065”
  • 2.251” to 2.500” ± 0.075”
  • 2.501” to 2.750” ± 0.090”
  • 2.751” to 3.000”± 0.115”
  • 3.001” to 3.500” ± 0.130”
  • 3.501” to 4.000” ± 0.160”
  • 4.001” to 4.500” ± 0.190”
  • 4.501” to 5.000” ± 0.225”
  • 5.001” to 5.500” ± 0.250”
  • 5.501” to 6.000” ± 0.280”
  • 6.001” to 6.500” ± 0.310”
  • 6.501” to 7.000” ± 0.350”

Wire Diameter Tolerances

Note: Acxess Spring does not manufacture the wire used to manufacture springs.

The following tolerances apply for the following wire types:

  • Hard Drawn HD A679
  • Hard Drawn ASTM A227
  • Music Wire ASTM A228
  • Oil Tempered MB A229
  • Carbon Valve A230
  • Phosphor Bronze Grade A B159
  • Beryllium Copper B197
  • Stainless Steel 17-7 ASTM A313
  • Stainless Steel 302 ASTM A313
  • Stainless Steel 316 ASTM A316
  • 0.005” to 0.018” ± 0.0005”
  • 0.019” to 0.040” ± 0.0006”
  • 0.041” to 0.0625” ± 0.0007”
  • 0.063” to 0.090” ± 0.0008”
  • 0.091” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”

The following tolerances apply for the following wire types:

  • Chrome Silicon A401
  • 5160 H
  • 0.100” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”
  • 0.626” to 0.750” ± 0.0016”
  • 0.751” to 1.250” ± 0.0017”

Length Inside Hooks Tolerances

  • 0.001” to 0.500” ± 0.015”
  • 0.501” to 1.000” ± 0.025”
  • 1.001” to 2.000” ± 0.035”
  • 2.001” to 4.000” ± 0.050”
  • 4.001” to 8.000” ± 0.125”
  • 8.001” to 10.000” ± 0.200”
  • 10.001” to 15.000” ± 0.300”
  • 15.001” to 20.000” ± 0.400”
  • 20.001” to 25.000” ± 0.550”
  • 25.001” to 30.000” ± 0.700”
  • 30.001” to 35.000” ± 0.900”
  • 35.001” to 40.000” ± 1.100”
  • 40.001” to 48.000” ± 1.250”

Rate Tolerances

Spring rate has a manufacturing tolerance of ±10%

Working Loads Tolerance

Working loads has a manufacturing tolerance of ±10%

Initial Tension Tolerances

Reference Only

Outer/Inner Diameter Tolerances

  • 0.025” to 0.050” ± 0.002”
  • 0.051” to 0.100” ± 0.003”
  • 0.101” to 0.250” ± 0.005”
  • 0.251” to 0.500” ± 0.008”
  • 0.501” to 0.850” ± 0.015”
  • 0.851” to 1.125” ± 0.020”
  • 1.126” to 1.250” ± 0.025”
  • 1.251” to 1.480” ± 0.030”
  • 1.481” to 1.750” ± 0.040”
  • 1.751” to 2.000” ± 0.055”
  • 2.001” to 2.250” ± 0.065”
  • 2.251” to 2.500” ± 0.075”
  • 2.501” to 2.750” ± 0.090”
  • 2.751” to 3.000”± 0.115”
  • 3.001” to 3.500” ± 0.130”
  • 3.501” to 4.000” ± 0.160”
  • 4.001” to 4.500” ± 0.190”
  • 4.501” to 5.000” ± 0.225”
  • 5.001” to 5.500” ± 0.250”
  • 5.501” to 6.000” ± 0.280”
  • 6.001” to 6.500” ± 0.310”
  • 6.501” to 7.000” ± 0.350”
  • 7.001” to 7.500” ± 0.385”
  • 7.501” to 8.000” ± 0.415”
  • 8.001” to 8.500” ± 0.455”
  • 8.501” to 9.000” ± 0.490”
  • 9.001” to 9.500” ± 0.525”
  • 9.501” to 10.000” ± 0.565”

Wire Diameter Tolerances

Note: Acxess Spring does not manufacture the wire used to manufacture springs.

The following tolerances apply for the following wire types:

  • Hard Drawn HD A679
  • Hard Drawn ASTM A227
  • Music Wire ASTM A228
  • Oil Tempered MB A229
  • Carbon Valve A230
  • Phosphor Bronze Grade A B159
  • Beryllium Copper B197
  • Stainless Steel 17-7 ASTM A313
  • Stainless Steel 302 ASTM A313
  • Stainless Steel 316 ASTM A316
  • 0.005” to 0.018” ± 0.0005”
  • 0.019” to 0.040” ± 0.0006”
  • 0.041” to 0.0625” ± 0.0007”
  • 0.063” to 0.090” ± 0.0008”
  • 0.091” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”

The following tolerances apply for the following wire types:

  • Chrome Silicon A401
  • 5160 H
  • 0.100” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”
  • 0.626” to 0.750” ± 0.0016”
  • 0.751” to 1.250” ± 0.0017”

Leg Length Tolerances

  • 0.020” to 0.025” ± 0.015”
  • 0.051” to 0.250” ± 0.030”
  • 0.251” to 1.000” ± 0.040”
  • 1.001” to 2.000” ± 0.060”
  • 2.001” to 4.000” ± 0.135”
  • 4.001” to 7.500” ± 0.155”
  • 7.501” to 10.000” ± 0.300”

Total Coils/Free Position Tolerances

±3/16 coil or reference if torque or rate needs to be met.

Rate Tolerances

Spring rate has a manufacturing tolerance of ±10%

Torque Tolerance

Torque has a manufacturing tolerance of ±10%

Standard Conical and Barrel Spring Tolerances

conical barrel spring dimensions standard tolerances

Small & Large Outer/Inner Diameter

  • 0.025” to 0.050” ± 0.002”
  • 0.051” to 0.100” ± 0.003”
  • 0.101” to 0.250” ± 0.005”
  • 0.251” to 0.500” ± 0.008”
  • 0.501” to 0.850” ± 0.015”
  • 0.851” to 1.125” ± 0.020”
  • 1.126” to 1.250” ± 0.025”
  • 1.251” to 1.480” ± 0.030”
  • 1.481” to 1.750” ± 0.040”
  • 1.751” to 2.000” ± 0.055”
  • 2.001” to 2.250” ± 0.065”
  • 2.251” to 2.500” ± 0.075”
  • 2.501” to 2.750” ± 0.090”
  • 2.751” to 3.000”± 0.115”
  • 3.001” to 3.500” ± 0.130”
  • 3.501” to 4.000” ± 0.160”
  • 4.001” to 4.375” ± 0.190”

Wire Diameter Tolerances

Note: Acxess Spring does not manufacture the wire used to manufacture springs.

The following tolerances apply for the following wire types:

  • Hard Drawn HD A679
  • Hard Drawn ASTM A227
  • Music Wire ASTM A228
  • Oil Tempered MB A229
  • Carbon Valve A230
  • Phosphor Bronze Grade A B159
  • Beryllium Copper B197
  • Stainless Steel 17-7 ASTM A313
  • Stainless Steel 302 ASTM A313
  • Stainless Steel 316 ASTM A316
  • 0.005” to 0.018” ± 0.0005”
  • 0.019” to 0.040” ± 0.0006”
  • 0.041” to 0.0625” ± 0.0007”
  • 0.063” to 0.090” ± 0.0008”
  • 0.091” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”

The following tolerances apply for the following wire types:

  • Chrome Silicon A401
  • 5160 H
  • 0.100” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”
  • 0.626” to 0.750” ± 0.0016”
  • 0.751” to 1.250” ± 0.0017”

Free Length Tolerances

  • 0.001” to 0.500” ± 0.015”
  • 0.501” to 1.000” ± 0.025”
  • 1.001” to 2.000” ± 0.035”
  • 2.001” to 4.000” ± 0.050”
  • 4.001” to 8.000” ± 0.125”
  • 8.001” to 10.000” ± 0.200”
  • 10.001” to 15.000” ± 0.300”
  • 15.001” to 20.000” ± 0.400”
  • 20.001” to 25.000” ± 0.550”
  • 25.001” to 30.000” ± 0.700”
  • 30.001” to 35.000” ± 0.900”
  • 35.001” to 40.000” ± 1.100”
  • 40.001” to 48.000” ± 1.250”

Total Coils Tolerances

±¼ coil or reference if load or rate needs to be met.

Rate Tolerance

Spring rate has a manufacturing tolerance of ±10%

Working Loads Tolerance

Working loads has a manufacturing tolerance of ±10%

Outer/Inner Diameter Tolerances

  • 0.040” to 0.050” ± 0.002”
  • 0.051” to 0.100” ± 0.003”
  • 0.101” to 0.250” ± 0.005”
  • 0.251” to 0.500” ± 0.008”
  • 0.501” to 0.850” ± 0.015”
  • 0.851” to 1.125” ± 0.020”
  • 1.126” to 1.250” ± 0.025”
  • 1.251” to 1.480” ± 0.030”
  • 1.481” to 1.750” ± 0.040”
  • 1.751” to 2.000” ± 0.055”
  • 2.001” to 2.250” ± 0.065”
  • 2.251” to 2.500” ± 0.075”
  • 2.501” to 2.750” ± 0.090”
  • 2.751” to 3.000”± 0.115”
  • 3.001” to 3.500” ± 0.130”
  • 3.501” to 4.000” ± 0.160”
  • 4.001” to 4.500” ± 0.190”
  • 4.501” to 5.000” ± 0.225”
  • 5.001” to 5.500” ± 0.250”
  • 5.501” to 6.000” ± 0.280”
  • 6.001” to 6.500” ± 0.310”
  • 6.501” to 7.000” ± 0.350”



Working Loads Tolerance

Working loads has a manufacturing tolerance of ±10%

Garter Spring Outer Diameter Tolerances

  • 3.000” to 5.000” ± 0.250”
  • 5.001” to 7.500” ± 0.375”
  • 7.501” to 10.000” ± 0.500”
  • 10.001” to 12.500” ± 0.750”
  • 12.501” to 15.000” ± 0.875”
  • 15.001” to 20.000” ± 1.000”
  • 20.001” to 25.000” ± 1.250”
  • 25.001” to 30.000” ± 1.500”


Length Tolerances

  • 0.001” to 0.500” ± 0.015”
  • 0.501” to 1.000” ± 0.025”
  • 1.001” to 2.000” ± 0.035”
  • 2.001” to 4.000” ± 0.050”
  • 4.001” to 8.000” ± 0.125”
  • 8.001” to 10.000” ± 0.200”
  • 10.001” to 15.000” ± 0.300”
  • 15.001” to 20.000” ± 0.400”
  • 20.001” to 25.000” ± 0.550”
  • 25.001” to 30.000” ± 0.700”
  • 30.001” to 35.000” ± 0.900”
  • 35.001” to 40.000” ± 1.100”
  • 40.001” to 48.000” ± 1.250”


Rate Tolerances

Spring rate has a manufacturing tolerance of ±10%

Wire Diameter Tolerances

Note: Acxess Spring does not manufacture the wire used to manufacture springs.

The following tolerances apply for the following wire types:

  • Hard Drawn HD A679
  • Hard Drawn ASTM A227
  • Music Wire ASTM A228
  • Oil Tempered MB A229
  • Carbon Valve A230
  • Phosphor Bronze Grade A B159
  • Beryllium Copper B197
  • Stainless Steel 17-7 ASTM A313
  • Stainless Steel 302 ASTM A313
  • Stainless Steel 316 ASTM A316
  • 0.005” to 0.018” ± 0.0005”
  • 0.019” to 0.040” ± 0.0006”
  • 0.041” to 0.0625” ± 0.0007”
  • 0.063” to 0.090” ± 0.0008”
  • 0.091” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”

The following tolerances apply for the following wire types:

  • Chrome Silicon A401
  • 5160 H
  • 0.100” to 0.125” ± 0.0009”
  • 0.126” to 0.250” ± 0.001”
  • 0.251” to 0.375” ± 0.00125”
  • 0.376” to 0.500” ± 0.001375”
  • 0.501” to 0.625” ± 0.0015”
  • 0.626” to 0.750” ± 0.0016”
  • 0.751” to 1.250” ± 0.0017”