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Specifications

 

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Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

CI 013EF 08M

Cost
$0.00
$0.00
Price
$0.00
Weight
0.00 lb.
Direction of Wind
Factory Option
Ends
Squared
Finish
Pre-coated with Tin
Material
Music Wire
Total Coils
7.530
Product Series
Published Stock Code
CI013EF08M
Product Type
Compression Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.25
Rate (kg/cm)
0.26
Rate (lb/in)
1.45
Rate (gm/mm)
25.83
Weight per Item (lb)
0.00
Material Specification
ASTM A228
Free Length (cm)
1.905
Free Length (inch)
0.750
Free Length (mm)
19.050
Free Length - Build Spec (in)
0.75
Free Length Tolerance (cm)
0.07
Free Length Tolerance (in)
0.03
Free Length Tolerance (mm)
0.66
Free Length Tolerance - Build Spec (in)
0.03
Hole Diameter (cm)
0.52
Hole Diameter (inch)
0.20
Hole Diameter (mm)
5.16
Inside Diameter (cm)
0.41
Inside Diameter (in)
0.16
Inside Diameter (mm)
4.11
Outside Diameter (cm)
0.478
Outside Diameter (in)
0.19
Outside Diameter (mm)
4.78
Outside Diameter - Build Spec (in)
0.19
Rate (gm/cm)
258.30
Rate (kg/mm)
0.03
Rate (N/cm)
2.53
Rate - Build Spec (lb/in)
1.45
Rate Tolerance (gm/cm)
25.89
Rate Tolerance (gm/mm)
2.59
Rate Tolerance (kg/cm)
0.03
Rate Tolerance (kg/mm)
0.00
Rate Tolerance (lb/in)
0.15
Rate Tolerance (N/cm)
0.25
Rate Tolerance (N/mm)
0.03
Rate Tolerance - Build Spec (lb/in)
0.15
Rod Diameter (cm)
0.38
Rod Diameter (inch)
0.15
Rod Diameter (mm)
3.84
Solid Height (cm)
0.29
Solid Height (inch)
0.11
Solid Height (mm)
2.90
Total Coils - Build Spec
7.53
Wire Diameter (cm)
0.03
Wire Diameter (inch)
0.01
Wire Diameter (mm)
0.33
Wire Diameter - Build Spec (in)
0.01
Hole Diameter - Build Spec. (in)
0.20
Rod Diameter - Build Spec. (in)
0.15
Rod Diameter Tolerance - Build Spec. (in)
MIN
Rod Diameter Tolerance (in)
MIN
Rod Diameter Tolerance (mm)
MIN
Rod Diameter Tolerance (cm)
MIN
Solid Height - Build Spec. (in)
0.11
Material Short Description
MW
Load at Solid Height (lb)
0.92
Load at Solid Height - Build Spec. (lb)
0.92
Load at Solid Height (N)
4.07
Load at Solid Height (kg)
0.42
Load at Solid Height (gm)
415.32
Active Coils - Build Spec.
5.53
Active Coils
5.53
Active Coils Tolerance - Build Spec.
Reference
Active Coils Tolerance
Reference
Product Series
Instrument Compression Series (inch)
Inside Diameter Tolerance (cm)
Reference
Inside Diameter Tolerance (in)
Reference
Inside Diameter Tolerance (mm)
Reference
Inside Diameter Tolerance - Build Spec (in)
Reference
Outside Diameter Tolerance (cm)
+0.008/-0.013
Outside Diameter Tolerance (in)
+0.003/-0.005
Outside Diameter Tolerance (mm)
+0.08/-0.13
Outside Diameter Tolerance - Build Spec (in)
+0.003/-0.005
Inside Diameter - Build Spec (in)
0.16
Outside Diameter Lower Tolerance (in)
0.01
Outside Diameter Upper Tolerance (in)
0.00
Outside Diameter Upper Tolerance (mm)
0.08
Outside Diameter Lower Tolerance (mm)
0.13
Model Code
CI

Instrument Compression Series (inch) Compression Springs

Precision Springs for Precision Products .

Lee Spring CI 013EF 08M is a precision compression spring from the Instrument Compression Series (inch), engineered for applications requiring reliable performance in moderate-load scenarios. This spring features an 0.188-inch outside diameter (4.78 mm) with a 0.203-inch hole diameter (5.16 mm) and extends to a free length of 0.75 inch (19.05 mm), making it ideal for instruments and assemblies where consistent and precise compression characteristics are critical. Made from Music Wire with a 0.013-inch wire diameter (0.33 mm), the spring delivers a spring rate of 1.446 lb/inch (0.253 N/mm) through its 5.53 active coils out of 7.53 total coils for predictable deflection behavior. The spring compresses to a solid height of 0.114 inch (2.9 mm) while supporting a maximum load of 0.916 lb (4.07 N) at full compression. The spring has Squared ends and a Pre-coated with Tin finish for optimal performance.

About the Compression Spring Instrument Series

The Lee 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 to mating hole/bore diameter sizes. Instrument Compression Springs are available in both inch and metric series. 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. Lee Spring Instrument Compression Springs feature squared ends. A squared end, also called a closed end, is made by reducing the coil pitch of the ends to zero. Squareness influences how a force produced by the spring can be transferred to adjacent parts

Instrument Compression Series (inch) Compression 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

298451
Product Compression OD 0.188 in, Length 0.75 in, Music Wire
Product Compression OD 4.78 mm, Length 19.05 mm, Music Wire
Part Number CI 013EF 08M
Series Instrument Compression Series (inch)
Outside Diameter (inch) 0.188
Outside Diameter (cm) 0.478
Outside Diameter (mm) 4.78
Hole Diameter (inch) 0.203
Hole Diameter (cm) 0.516
Hole Diameter (mm) 5.16
Rod Diameter (inch) 0.151
Rod Diameter (cm) 0.384
Rod Diameter (mm) 3.84
Free Length (inch) 0.75
Free Length (cm) 1.905
Free Length (mm) 19.05
Rate (gm/mm) 25.83
Rate (kg/cm) 0.258
Rate (kg/mm) 0.0258
Rate (lb/inch) 1.446
Rate (gm/cm) 258.3
Rate (N/cm) 2.53
Rate (N/mm) 0.253
Solid Height (inch) 0.114
Solid Height (cm) 0.29
Solid Height (mm) 2.9
Wire Diameter (inch) 0.013
Wire Diameter (cm) 0.033
Wire Diameter (mm) 0.33
Material Music Wire
Load at Solid Height (gm) 415.32
Load at Solid Height (kg) 0.415
Load at Solid Height (lb) 0.916
Load at Solid Height (N) 4.07
Ends Squared
Active Coils 5.53
Direction of Wind Factory Option
Finish Pre-coated with Tin
Total Coils 7.53
0.013 0.188 0.003 0.005 0.203 0.151 0.75 0.026 7.53 1.446 0.145 0.1141 0.916 0.013 0.75 0.188 0.33 4.78 0.08 5.16 3.84 19.05 0.66 0.253 2.9 4.07
Default View
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Top view
Quantity Price
1 - 19 $7.680
20 - 49 $4.650
50 - 99 $2.350
100 - 199 $1.510
200 - 299 $1.148
300 - 399 $1.030
400 - 499 $0.925
500 - 599 $0.829
600 - 699 $0.749
700 - 799 $0.679
800 - 899 $0.619
900 - 999 $0.574
1000 $0.538

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