Standard Spring Dimension Tolerances in Metric

At China Spring Products Corp 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

0.6350mm to 1.2700mm ± 0.0508mm
1.2701mm to 2.5400mm ± 0.0762mm
2.5401mm to 6.3500mm ± 0.1270mm
6.3501mm to 12.700mm ± 0.2032mm
12.701mm to 21.590mm ± 0.3810mm
21.591mm to 28.575mm ± 0.5080mm
28.576mm to 31.750mm ± 0.6350mm
31.751mm to 37.592mm ± 0.7620mm
37.593mm to 44.450mm ± 1.0160mm
44.451mm to 50.800mm ± 1.3970mm
50.801mm to 57.150mm ± 1.6510mm
57.151mm to 63.500mm ± 1.9050mm
63.501mm to 69.850mm ± 2.2860mm
69.851mm to 76.200mm ± 2.9210mm
76.201mm to 88.900mm ± 3.3020mm
88.901mm to 101.60mm ± 4.0640mm
101.61mm to 114.30mm ± 4.8260mm
114.31mm to 127.00mm ± 5.7150mm
127.01mm to 139.70mm ± 6.3500mm
139.71mm to 152.40mm ± 7.1120mm
152.41mm to 165.10mm ± 7.8740mm
165.11mm to 177.80mm ± 8.8900mm
177.81mm to 190.50mm ± 9.7790mm
190.51mm to 203.20mm ± 10.541mm
203.21mm to 215.90mm ± 11.557mm
215.91mm to 228.60mm ± 12.446mm
228.61mm to 241.30mm ± 13.335mm
241.31mm to 254.00mm ± 14.351mm

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

0.1270mm to 0.4572mm ± 0.01270mm
0.4573mm to 1.0160mm ± 0.01524mm
1.0161mm to 1.5875mm ± 0.01778mm
1.5876mm to 2.2860mm ± 0.02032mm
2.2861mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm

The following tolerances apply for the following wire types:

Chrome Silicon A401
5160 H

2.5400mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm
15.876mm to 19.050mm ± 0.04064mm
19.051mm to 31.750mm ± 0.04318mm

Free Length Tolerances

0.0254mm to 12.700mm ± 0.381mm
12.701mm to 25.400mm ± 0.508mm
25.401mm to 50.800mm ± 1.270mm
50.801mm to 101.60mm ± 2.540mm
101.61mm to 203.20mm ± 5.080mm
203.21mm to 254.00mm ± 7.620mm
254.01mm to 381.00mm ± 10.160mm
381.01mm to 508.00mm ± 12.700mm
508.01mm to 635.00mm ± 16.510mm
635.01mm to 762.00mm ± 20.320mm
762.01mm to 889.00mm ± 25.400mm
889.01mm to 1016.0mm ± 30.480mm
1016.1mm to 1219.2mm ± 34.925mm
1219.3mm and up ± 38.100mm

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%

Standard Extension Spring Tolerances

tension extension spring dimensions standard tolerances

Outer/Inner Diameter Tolerances

0.6350mm to 1.2700mm ± 0.0508mm
1.2701mm to 2.5400mm ± 0.0762mm
2.5401mm to 6.3500mm ± 0.1270mm
6.3501mm to 12.700mm ± 0.2032mm
12.701mm to 21.590mm ± 0.3810mm
21.591mm to 28.575mm ± 0.5080mm
28.576mm to 31.750mm ± 0.6350mm
31.751mm to 37.592mm ± 0.7620mm
37.593mm to 44.450mm ± 1.0160mm
44.451mm to 50.800mm ± 1.3970mm
50.801mm to 57.150mm ± 1.6510mm
57.151mm to 63.500mm ± 1.9050mm
63.501mm to 69.850mm ± 2.2860mm
69.851mm to 76.200mm ± 2.9210mm
76.201mm to 88.900mm ± 3.3020mm
88.901mm to 101.60mm ± 4.0640mm
101.61mm to 114.30mm ± 4.8260mm
114.31mm to 127.00mm ± 5.7150mm
127.01mm to 139.70mm ± 6.3500mm
139.71mm to 152.40mm ± 7.1120mm
152.41mm to 165.10mm ± 7.8740mm
165.11mm to 177.80mm ± 8.8900mm

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

0.1270mm to 0.4572mm ± 0.01270mm
0.4573mm to 1.0160mm ± 0.01524mm
1.0161mm to 1.5875mm ± 0.01778mm
1.5876mm to 2.2860mm ± 0.02032mm
2.2861mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm

The following tolerances apply for the following wire types:

Chrome Silicon A401
5160 H

2.5400mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm
15.876mm to 19.050mm ± 0.04064mm
19.051mm to 31.750mm ± 0.04318mm

Length Inside Hooks Tolerances

0.0254mm to 12.700mm ± 0.381mm
12.701mm to 25.400mm ± 0.508mm
25.401mm to 50.800mm ± 0.762mm
50.801mm to 101.60mm ± 1.270mm
101.61mm to 203.20mm ± 2.362mm
203.21mm to 254.00mm ± 3.962mm
254.01mm to 381.00mm ± 6.250mm
381.01mm to 508.00mm ± 8.890mm
508.01mm to 635.00mm ± 12.70mm
635.01mm to 762.00mm ± 16.51mm
762.01mm to 889.00mm ± 20.32mm
889.01mm to 1016.0mm ± 25.40mm
1016.1mm to 1219.2mm ± 31.75mm

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

Standard Torsion Spring Tolerances

torsion spring dimensions standard tolerances

Outer/Inner Diameter Tolerances

0.6350mm to 1.2700mm ± 0.0508mm
1.2701mm to 2.5400mm ± 0.0762mm
2.5401mm to 6.3500mm ± 0.1270mm
6.3501mm to 12.700mm ± 0.2032mm
12.701mm to 21.590mm ± 0.3810mm
21.591mm to 28.575mm ± 0.5080mm
28.576mm to 31.750mm ± 0.6350mm
31.751mm to 37.592mm ± 0.7620mm
37.593mm to 44.450mm ± 1.0160mm
44.451mm to 50.800mm ± 1.3970mm
50.801mm to 57.150mm ± 1.6510mm
57.151mm to 63.500mm ± 1.9050mm
63.501mm to 69.850mm ± 2.2860mm
69.851mm to 76.200mm ± 2.9210mm
76.201mm to 88.900mm ± 3.3020mm
88.901mm to 101.60mm ± 4.0640mm
101.61mm to 114.30mm ± 4.8260mm
114.31mm to 127.00mm ± 5.7150mm
127.01mm to 139.70mm ± 6.3500mm
139.71mm to 152.40mm ± 7.1120mm
152.41mm to 165.10mm ± 7.8740mm
165.11mm to 177.80mm ± 8.8900mm
177.81mm to 190.50mm ± 9.7790mm
190.51mm to 203.20mm ± 10.541mm
203.21mm to 215.90mm ± 11.557mm
215.91mm to 228.60mm ± 12.446mm
228.61mm to 241.30mm ± 13.335mm
241.31mm to 254.00mm ± 14.351mm

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

0.1270mm to 0.4572mm ± 0.01270mm
0.4573mm to 1.0160mm ± 0.01524mm
1.0161mm to 1.5875mm ± 0.01778mm
1.5876mm to 2.2860mm ± 0.02032mm
2.2861mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm

The following tolerances apply for the following wire types:

Chrome Silicon A401
5160 H

2.5400mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm
15.876mm to 19.050mm ± 0.04064mm
19.051mm to 31.750mm ± 0.04318mm

Leg Length Tolerances

0.508mm to 1.270mm ± 0.254mm
1.271mm to 6.350mm ± 0.635mm
6.351mm to 25.40mm ± 0.889mm
25.41mm to 50.80mm ± 1.270mm
50.81mm to 101.6mm ± 2.032mm
101.7mm to 190.5mm ± 3.810mm
190.6mm to 254.0mm ± 6.985mm

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

0.6350mm to 1.2700mm ± 0.0508mm
1.2701mm to 2.5400mm ± 0.0762mm
2.5401mm to 6.3500mm ± 0.1270mm
6.3501mm to 12.700mm ± 0.2032mm
12.701mm to 21.590mm ± 0.3810mm
21.591mm to 28.575mm ± 0.5080mm
28.576mm to 31.750mm ± 0.6350mm
31.751mm to 37.592mm ± 0.7620mm
37.593mm to 44.450mm ± 1.0160mm
44.451mm to 50.800mm ± 1.3970mm
50.801mm to 57.150mm ± 1.6510mm
57.151mm to 63.500mm ± 1.9050mm
63.501mm to 69.850mm ± 2.2860mm
69.851mm to 76.200mm ± 2.9210mm
76.201mm to 88.900mm ± 3.3020mm
88.901mm to 101.60mm ± 4.0640mm
101.61mm to 114.30mm ± 4.8260mm

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

0.1270mm to 0.4572mm ± 0.01270mm
0.4573mm to 1.0160mm ± 0.01524mm
1.0161mm to 1.5875mm ± 0.01778mm
1.5876mm to 2.2860mm ± 0.02032mm
2.2861mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm

The following tolerances apply for the following wire types:

Chrome Silicon A401
5160 H

2.5400mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm
15.876mm to 19.050mm ± 0.04064mm
19.051mm to 31.750mm ± 0.04318mm

Free Length Tolerances

0.0254mm to 12.700mm ± 0.381mm
12.701mm to 25.400mm ± 0.508mm
25.401mm to 50.800mm ± 0.762mm
50.801mm to 101.60mm ± 1.270mm
101.61mm to 203.20mm ± 2.362mm
203.21mm to 254.00mm ± 3.962mm
254.01mm to 381.00mm ± 6.250mm
381.01mm to 508.00mm ± 8.890mm
508.01mm to 635.00mm ± 12.70mm
635.01mm to 762.00mm ± 16.51mm
762.01mm to 889.00mm ± 20.32mm
889.01mm to 1016.0mm ± 25.40mm
1016.1mm to 1219.2mm ± 31.75mm

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%

Standard Garter Spring Tolerances

garter spring dimensions standard tolerances

Outer/Inner Diameter Tolerances

0.6350mm to 1.2700mm ± 0.0508mm
1.2701mm to 2.5400mm ± 0.0762mm
2.5401mm to 6.3500mm ± 0.1270mm
6.3501mm to 12.700mm ± 0.2032mm
12.701mm to 21.590mm ± 0.3810mm
21.591mm to 28.575mm ± 0.5080mm
28.576mm to 31.750mm ± 0.6350mm
31.751mm to 37.592mm ± 0.7620mm
37.593mm to 44.450mm ± 1.0160mm
44.451mm to 50.800mm ± 1.3970mm
50.801mm to 57.150mm ± 1.6510mm
57.151mm to 63.500mm ± 1.9050mm
63.501mm to 69.850mm ± 2.2860mm
69.851mm to 76.200mm ± 2.9210mm
76.201mm to 88.900mm ± 3.3020mm
88.901mm to 101.60mm ± 4.0640mm
101.61mm to 114.30mm ± 4.8260mm
114.31mm to 127.00mm ± 5.7150mm
127.01mm to 139.70mm ± 6.3500mm
139.71mm to 152.40mm ± 7.1120mm
152.41mm to 165.10mm ± 7.8740mm
165.11mm to 177.80mm ± 8.8900mm

Working Loads Tolerance

Working loads has a manufacturing tolerance of ±10%

Garter Spring Outer Diameter Tolerances

76.20mm to 127.0mm ± 6.350mm
127.1mm to 190.5mm ± 9.525mm
190.6mm to 254.0mm ± 12.70mm
254.1mm to 317.5mm ± 19.05mm
317.6mm to 381.0mm ± 22.23mm
381.1mm to 508.0mm ± 25.40mm
508.1mm to 635.0mm ± 31.75mm
635.1mm to 762.0mm ± 38.10mm

Length Tolerances

0.0254mm to 12.700mm ± 0.381mm
12.701mm to 25.400mm ± 0.508mm
25.401mm to 50.800mm ± 0.762mm
50.801mm to 101.60mm ± 1.270mm
101.61mm to 203.20mm ± 2.362mm
203.21mm to 254.00mm ± 3.962mm
254.01mm to 381.00mm ± 6.250mm
381.01mm to 508.00mm ± 8.890mm
508.01mm to 635.00mm ± 12.70mm
635.01mm to 762.00mm ± 16.51mm
762.01mm to 889.00mm ± 20.32mm
889.01mm to 1016.0mm ± 25.40mm
1016.1mm to 1219.2mm ± 31.75mm

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

0.1270mm to 0.4572mm ± 0.01270mm
0.4573mm to 1.0160mm ± 0.01524mm
1.0161mm to 1.5875mm ± 0.01778mm
1.5876mm to 2.2860mm ± 0.02032mm
2.2861mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm

The following tolerances apply for the following wire types:

Chrome Silicon A401
5160 H

2.5400mm to 3.1750mm ± 0.02286mm
3.1751mm to 6.3500mm ± 0.02540mm
6.3501mm to 9.5250mm ± 0.03175mm
9.5251mm to 12.700mm ± 0.03493mm
12.701mm to 15.875mm ± 0.03810mm
15.876mm to 19.050mm ± 0.04064mm
19.051mm to 31.750mm ± 0.04318mm