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Extension Spring

Extension Springs — In Stock & Ready to Ship

Lee Spring stocks wide selection of extension springs in standard and instrument series configurations available for immediate shipment. Our in-stock extension spring inventory includes music wire, Type 302 stainless steel, and Type 316 stainless steel options with various end loop configurations. Filter by outside diameter, wire diameter, free length, initial tension, and maximum load to find the exact specification you need easily. All stock extension springs include free standard ground shipping option and a Certificate of Compliance. Learn more about Extension Springs and How to Measure an Extension Spring.

Results 5399 Springs
EI 012B 06 S
0.239
0.094
2.39
0.03
0.012
0.3
377.8
0.3778
0.833
3.705
143
14.3
0.143
0.0143
0.8
1.4
0.14
4.61
1.815
46.1
37.8
0.0378
0.0833
0.371
2.223
0.875
22.23
SS
EI 012B 06 M
0.239
0.094
2.39
0.03
0.012
0.3
453.6
0.4536
1
4.448
171
17.1
0.171
0.0171
0.96
1.68
0.168
4.61
1.815
46.1
45.4
0.0454
0.1
0.445
2.223
0.875
22.23
MW
EI 012B 05 S
0.239
0.094
2.39
0.03
0.012
0.3
377.8
0.3778
0.833
3.705
179
17.9
0.179
0.0179
1
1.75
0.175
3.81
1.5
38.1
37.8
0.0378
0.0833
0.371
1.905
0.75
19.05
SS
EI 012B 05 M
0.239
0.094
2.39
0.03
0.012
0.3
453.6
0.4536
1
4.448
214
21.4
0.214
0.0214
1.2
2.1
0.21
3.81
1.5
38.1
45.4
0.0454
0.1
0.445
1.905
0.75
19.05
MW
EI 012B 04 S
0.239
0.094
2.39
0.03
0.012
0.3
377.8
0.3778
0.833
3.705
223
22.3
0.223
0.0223
1.25
2.19
0.219
3.112
1.225
31.12
37.8
0.0378
0.0833
0.371
1.588
0.625
15.88
SS
EI 012B 04 M
0.239
0.094
2.39
0.03
0.012
0.3
453.6
0.4536
1
4.448
268
26.8
0.268
0.0268
1.5
2.63
0.263
3.112
1.225
31.12
45.4
0.0454
0.1
0.445
1.588
0.625
15.88
MW
EI 012B 03 S
0.239
0.094
2.39
0.03
0.012
0.3
377.8
0.3778
0.833
3.705
298
29.8
0.298
0.0298
1.67
2.92
0.292
2.413
0.95
24.13
37.8
0.0378
0.0833
0.371
1.27
0.5
12.7
SS
EI 012B 03 M
0.239
0.094
2.39
0.03
0.012
0.3
453.6
0.4536
1
4.448
357
35.7
0.357
0.0357
2
3.5
0.35
2.413
0.95
24.13
45.4
0.0454
0.1
0.445
1.27
0.5
12.7
MW
EI 012B 02 S
0.239
0.094
2.39
0.03
0.012
0.3
377.8
0.3778
0.833
3.705
357
35.7
0.357
0.0357
2
3.5
0.35
2.078
0.818
20.78
37.8
0.0378
0.0833
0.371
1.113
0.438
11.13
SS
EI 012B 02 M
0.239
0.094
2.39
0.03
0.012
0.3
453.6
0.4536
1
4.448
429
42.9
0.429
0.0429
2.4
4.2
0.42
2.078
0.818
20.78
45.4
0.0454
0.1
0.445
1.113
0.438
11.13
MW
EI 012B 01 S
0.239
0.094
2.39
0.03
0.012
0.3
377.8
0.3778
0.833
3.705
477
47.7
0.477
0.0477
2.67
4.68
0.468
1.664
0.655
16.64
37.8
0.0378
0.0833
0.371
0.953
0.375
9.53
SS
EI 012B 01 M
0.239
0.094
2.39
0.03
0.012
0.3
453.6
0.4536
1
4.448
571
57.1
0.571
0.0571
3.2
5.6
0.56
1.664
0.655
16.64
45.4
0.0454
0.1
0.445
0.953
0.375
9.53
MW
EI 010B 04 M
0.239
0.094
2.39
0.025
0.01
0.25
272.2
0.2722
0.6
2.669
100
10
0.1
0.01
0.56
0.98
0.098
4.077
1.605
40.77
22.7
0.0227
0.05
0.222
1.588
0.625
15.88
MW
EI 011B 06 M
0.239
0.094
2.39
0.028
0.011
0.28
362.9
0.3629
0.8
3.559
107
10.7
0.107
0.0107
0.6
1.05
0.105
5.321
2.095
53.21
31.8
0.0318
0.07
0.311
2.223
0.875
22.23
MW
EI 011B 05 S316
0.239
0.094
2.39
0.028
0.011
0.28
226.3
0.2263
0.499
2.22
109
10.9
0.109
0.0109
0.61
1.07
0.107
3.739
1.472
37.39
26.4
0.0264
0.0583
0.259
1.905
0.75
19.05
SS 316
EI 011B 05 S
0.239
0.094
2.39
0.028
0.011
0.28
302.3
0.3023
0.6664
2.964
109
10.9
0.109
0.0109
0.61
1.07
0.107
4.445
1.75
44.45
26.4
0.0264
0.0583
0.259
1.905
0.75
19.05
SS
EI 011B 05 M
0.239
0.094
2.39
0.028
0.011
0.28
362.9
0.3629
0.8
3.559
130
13
0.13
0.013
0.73
1.28
0.128
4.445
1.75
44.45
31.8
0.0318
0.07
0.311
1.905
0.75
19.05
MW
EI 010B 04 S316
0.239
0.094
2.39
0.025
0.01
0.25
169.6
0.1696
0.374
1.664
84
8.4
0.084
0.0084
0.47
0.82
0.082
3.383
1.332
33.83
18.9
0.0189
0.0416
0.185
1.588
0.625
15.88
SS 316
EI 010B 05 S
0.239
0.094
2.39
0.025
0.01
0.25
226.7
0.2267
0.4998
2.223
66
6.6
0.066
0.0066
0.37
0.65
0.065
5.08
2
50.8
18.9
0.0189
0.0416
0.185
1.905
0.75
19.05
SS
EI 010B 05 M
0.239
0.094
2.39
0.025
0.01
0.25
272.2
0.2722
0.6
2.669
79
7.9
0.079
0.0079
0.44
0.77
0.077
5.08
2
50.8
22.7
0.0227
0.05
0.222
1.905
0.75
19.05
MW

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large selection of springs

Selection

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products made to your specification.

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on Stock Springs in the Continental United States

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on all Music Wire Stock Springs

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Springs ready to ship
today.

Expert Engineering Assistance

on Stock and Custom Springs

Certificate of Compliance

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LeeSpring

Lee Spring, 140 58th Street, Brooklyn, NY 11220 | 888-777-4647
Copyright 2020 Lee Spring Company