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Specifications

 

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Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

EI 012C 04 M

Cost
$0.00
$0.00
Price
$0.00
Weight
0.00 lb.
Direction of Wind
Factory Option
Ends
Standard Loops
Finish
Pre-coated with Tin
Material
Music Wire
Total Coils
36.900
Published Stock Code
EI012C04M
Product Type
Extension Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.16
Rate (kg/cm)
0.16
Rate (lb/in)
0.91
Rate (gm/mm)
16.30
Weight per Item (lb)
0.00
Material Specification
ASTM A228
Free Length (cm)
1.588
Free Length (inch)
0.625
Free Length (mm)
15.880
Free Length - Build Spec (in)
0.63
Free Length Tolerance (cm)
0.05
Free Length Tolerance (in)
0.02
Free Length Tolerance (mm)
0.51
Free Length Tolerance - Build Spec (in)
0.02
Inside Diameter (cm)
0.22
Inside Diameter (in)
0.09
Inside Diameter (mm)
2.16
Outside Diameter (cm)
0.277
Outside Diameter (in)
0.11
Outside Diameter (mm)
2.77
Outside Diameter - Build Spec (in)
0.11
Outside Diameter Tolerance (cm)
0.01
Outside Diameter Tolerance (in)
0.01
Outside Diameter Tolerance (mm)
0.13
Outside Diameter Tolerance - Build Spec (in)
0.01
Rate (gm/cm)
163.00
Rate (kg/mm)
0.02
Rate (N/cm)
1.60
Rate - Build Spec (lb/in)
0.91
Rate Tolerance (gm/cm)
16.30
Rate Tolerance (gm/mm)
1.63
Rate Tolerance (kg/cm)
0.02
Rate Tolerance (kg/mm)
0.00
Rate Tolerance (lb/in)
0.09
Rate Tolerance (N/cm)
0.16
Rate Tolerance (N/mm)
0.02
Rate Tolerance - Build Spec (lb/in)
0.09
Total Coils - Build Spec
36.85
Wire Diameter (cm)
0.03
Wire Diameter (inch)
0.01
Wire Diameter (mm)
0.30
Wire Diameter - Build Spec (in)
0.01
Material Short Description
MW
Product Series
Instrument Extension Series (inch)
Inside Diameter Tolerance (cm)
Reference
Inside Diameter Tolerance (in)
Reference
Inside Diameter Tolerance (mm)
Reference
Initial Tension - Build Spec. (lb)
0.09
Initial Tension (lb)
0.09
Initial Tension (N)
0.38
Initial Tension (kg)
0.04
Initial Tension (gm)
38.60
Initial Tension Tolerance - Build Spec. (lb)
0.02
Initial Tension Tolerance (lb)
0.02
Initial Tension Tolerance (N)
0.08
Initial Tension Tolerance (kg)
0.01
Initial Tension Tolerance (gm)
7.71
Inside Diameter Tolerance - Build Spec (in)
REF
Max Load - Build Spec. (lb)
0.92
Max Load (lb)
0.92
Max Load (kg)
0.42
Max Load (gm)
415.00
Max Extended Length - Build Spec. (in)
1.53
Max Extended Length (in)
1.53
Max Extended Length (mm)
38.94
Max Extended Length (cm)
3.89
Body Length - Build Spec. (in)
0.45
Body Length (in)
0.45
Body Length (mm)
11.53
Body Length (cm)
1.15
Loop Inside Diameter - Build Spec. (in)
0.09
Loop Inside Diameter (in)
0.09
Loop Inside Diameter (mm)
2.16
Loop Inside Diameter (cm)
0.22
Loop Position
Random
Loop Opening - Build Spec. (in)
0.01
Loop Opening (in)
0.01
Loop Opening (mm)
0.30
Loop Opening (cm)
0.03
Max Load (N)
4.07
Inside Diameter - Build Spec (in)
0.09
Model Code
EI

Instrument Extension Series (inch)

Precision Springs for Precision Products.

Lee Spring EI 012C 04 M is a precision extension spring from the Instrument Extension Series (inch) series, engineered for applications requiring reliable quality extension springs. This spring features a 0.109-inch outside diameter (2.77 mm) with 0.085-inch loop inside diameter (2.16 mm) and extends from a free length of 0.625 inch (15.88 mm) to a maximum extended length of 1.533 inch (38.94 mm). Made from Music Wire with a 0.012-inch wire diameter (0.3 mm), the spring delivers a spring rate of 0.914 lb/inch (0.16 N/mm) through its 36.9 total coils with an initial tension of 0.085 lb (0.378 N). The spring supports a maximum load of 0.915 lb (4.07 N) at full extension with a body length of 0.454 inch (11.53 mm). The spring features Random loop position and Pre-coated with Tin finish for optimal performance.

About the Extension Spring Instrument Series

The Lee Spring Extension Spring Instrument Series includes a wide range of size and rate combinations in a smaller, highly precise spring design. Selections are sorted in ascending order based on outside diameter. Instrument Series Extension Springs are available in both inch and metric sizes. Sizes range from outside diameters from .063" up to .157" and free lengths from .250" to 1.181". Inch Series springs are available in Music Wire, Type 302 Stainless Steel and Type 316 Stainless Steel. Metric Series springs are available in Music Wire and Type 302 Stainless Steel. The Music Wire springs are made from coated wire or provided with a plating finish for light corrosion resistance. The Type 302 Stainless Steel springs are passivated, while Type 316 Stainless Steel springs are passivated and ultrasonically cleaned.

Instrument Extension Series (inch) Extension Springs have useful applications in various industries, including:

  • Medical devices
  • Firearms
  • Pharmaceutical delivery devices
  • Lighting and electrical control
  • Petro-chemical processes
  • Communication devices
  • Aerospace
  • Testing and measurement equipment
  • Marine applications
  • Automotive
  • Locks and security devices
  • Precision Instruments
  • Hardware

...and many more applications

235481
Product Extension OD 0.109 in, Length 0.625 in, Music Wire
Product Extension OD 2.77 mm, Length 15.88 mm, Music Wire
Part Number EI 012C 04 M
Series Instrument Extension Series (inch)
Outside Diameter (inch) 0.109
Outside Diameter (cm) 0.277
Outside Diameter (mm) 2.77
Wire Diameter (inch) 0.012
Wire Diameter (cm) 0.03
Wire Diameter (mm) 0.3
Max Load (gm) 415
Max Load (lb) 0.915
Max Load (kg) 0.415
Max Load (N) 4.07
Rate (gm/cm) 163
Rate (gm/mm) 16.3
Rate (kg/cm) 0.163
Rate (kg/mm) 0.0163
Rate (lb/in) 0.914
Rate (N/cm) 1.6
Rate (N/mm) 0.16
Max Extended Length (cm) 3.894
Max Extended Length (in) 1.533
Max Extended Length (mm) 38.94
Initial Tension (gm) 38.6
Initial Tension (kg) 0.0386
Initial Tension (lb) 0.085
Initial Tension (N) 0.378
Free Length (cm) 1.588
Free Length (inch) 0.625
Free Length (mm) 15.88
Material Music Wire
Loop Inside Diameter (cm) 0.216
Loop Inside Diameter (in) 0.085
Loop Inside Diameter (mm) 2.16
Ends Standard Loops
Loop Position Random
Direction of Wind Factory Option
Finish Pre-coated with Tin
0.012 0.109 0.005 0.625 0.02 36.9 0.085 0.017 0.914 0.091 1.533 0.915 0.012 0.454 Random 0.109 0.005 0.625 0.02 36.9 0.085 0.017 0.914 0.091 1.533 0.915
Default View
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Quantity Price
1 - 19 $8.870
20 - 49 $5.370
50 - 99 $2.840
100 - 199 $1.770
200 - 299 $1.531
300 - 399 $1.423
400 - 499 $1.327
500 - 599 $1.237
600 - 699 $1.161
700 - 799 $1.097
800 - 899 $1.043
900 - 999 $1.002
1000 $0.969

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