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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 013B 06 M
0.239
0.094
2.39
0.033
0.013
0.33
567
0.567
1.25
5.56
268
26.8
0.268
0.0268
1.5
2.63
0.263
4.128
1.625
41.28
59
0.059
0.13
0.578
2.223
0.875
22.23
MW
EI 013B 05 M
0.239
0.094
2.39
0.033
0.013
0.33
567
0.567
1.25
5.56
321
32.1
0.321
0.0321
1.8
3.15
0.315
3.48
1.37
34.8
59
0.059
0.13
0.578
1.905
0.75
19.05
MW
EI 013B 04 S
0.239
0.094
2.39
0.033
0.013
0.33
472.3
0.4723
1.0412
4.631
336
33.6
0.336
0.0336
1.88
3.29
0.329
2.858
1.125
28.58
49.1
0.0491
0.1082
0.481
1.588
0.625
15.88
SS
EI 013B 04 M
0.239
0.094
2.39
0.033
0.013
0.33
567
0.567
1.25
5.56
404
40.4
0.404
0.0404
2.26
3.96
0.396
2.858
1.125
28.58
59
0.059
0.13
0.578
1.588
0.625
15.88
MW
EI 013B 03 S
0.239
0.094
2.39
0.033
0.013
0.33
472.3
0.4723
1.0412
4.631
461
46.1
0.461
0.0461
2.58
4.52
0.452
2.184
0.86
21.84
49.1
0.0491
0.1082
0.481
1.27
0.5
12.7
SS
EI 013B 03 M
0.239
0.094
2.39
0.033
0.013
0.33
567
0.567
1.25
5.56
554
55.4
0.554
0.0554
3.1
5.43
0.543
2.184
0.86
21.84
59
0.059
0.13
0.578
1.27
0.5
12.7
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 013B 01 S
0.239
0.094
2.39
0.033
0.013
0.33
472.3
0.4723
1.0412
4.631
714
71.4
0.714
0.0714
4
7.01
0.701
1.537
0.605
15.37
49.1
0.0491
0.1082
0.481
0.953
0.375
9.53
SS
EI 013B 01 M
0.239
0.094
2.39
0.033
0.013
0.33
567
0.567
1.25
5.56
857
85.7
0.857
0.0857
4.8
8.41
0.841
1.537
0.605
15.37
59
0.059
0.13
0.578
0.953
0.375
9.53
MW
EI 012B 07 S
0.239
0.094
2.39
0.03
0.012
0.3
377.8
0.3778
0.833
3.705
121
12.1
0.121
0.0121
0.68
1.19
0.119
5.334
2.1
53.34
37.8
0.0378
0.0833
0.371
2.54
1
25.4
SS
EI 012B 07 M
0.239
0.094
2.39
0.03
0.012
0.3
453.6
0.4536
1
4.448
146
14.6
0.146
0.0146
0.82
1.44
0.144
5.334
2.1
53.34
45.4
0.0454
0.1
0.445
2.54
1
25.4
MW
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 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 013B 02 S
0.239
0.094
2.39
0.033
0.013
0.33
472.3
0.4723
1.0412
4.631
550
55
0.55
0.055
3.08
5.39
0.539
1.875
0.738
18.75
49.1
0.0491
0.1082
0.481
1.113
0.438
11.13
SS
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 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 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

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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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Expert Engineering Assistance

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Certificate of Compliance

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LeeSpring

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