Standard Spring Dimension Tolerances for Custom and Stock Springs

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: China Spring Products Corp 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” ± 0.050”
• 2.001” to 4.000” ± 0.100”
• 4.001” to 8.000” ± 0.200”
• 8.001” to 10.000” ± 0.300”
• 10.001” to 15.000” ± 0.400”
• 15.001” to 20.000” ± 0.500”
• 20.001” to 25.000” ± 0.650”
• 25.001” to 30.000” ± 0.800”
• 30.001” to 35.000” ± 1.000”
• 35.001” to 40.000” ± 1.200”
• 40.001” to 48.000” ± 1.375”
• 48.000” and up ± 1.500”

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: China Spring Products Corp 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”

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: China Spring Products Corp 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%

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: China Spring Products Corp 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: China Spring Products Corp 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”