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Specifications

 

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Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

CI 008A 04 M

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
15.060
Product Series
Published Stock Code
CI008A04M
Product Type
Compression Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.70
Rate (kg/cm)
0.71
Rate (lb/in)
4.00
Rate (gm/mm)
71.43
Weight per Item (lb)
0.00
Material Specification
ASTM A228
Free Length (cm)
0.795
Free Length (inch)
0.313
Free Length (mm)
7.950
Free Length - Build Spec (in)
0.31
Free Length Tolerance (cm)
0.05
Free Length Tolerance (in)
0.02
Free Length Tolerance (mm)
0.46
Free Length Tolerance - Build Spec (in)
0.02
Hole Diameter (cm)
0.16
Hole Diameter (inch)
0.06
Hole Diameter (mm)
1.60
Inside Diameter (cm)
0.10
Inside Diameter (in)
0.04
Inside Diameter (mm)
1.04
Outside Diameter (cm)
0.145
Outside Diameter (in)
0.06
Outside Diameter (mm)
1.45
Outside Diameter - Build Spec (in)
0.06
Rate (gm/cm)
714.30
Rate (kg/mm)
0.07
Rate (N/cm)
7.01
Rate - Build Spec (lb/in)
4.00
Rate Tolerance (gm/cm)
71.43
Rate Tolerance (gm/mm)
7.14
Rate Tolerance (kg/cm)
0.07
Rate Tolerance (kg/mm)
0.01
Rate Tolerance (lb/in)
0.40
Rate Tolerance (N/cm)
0.70
Rate Tolerance (N/mm)
0.07
Rate Tolerance - Build Spec (lb/in)
0.40
Rod Diameter (cm)
0.09
Rod Diameter (inch)
0.04
Rod Diameter (mm)
0.91
Solid Height (cm)
0.33
Solid Height (inch)
0.13
Solid Height (mm)
3.25
Total Coils - Build Spec
15.06
Wire Diameter (cm)
0.02
Wire Diameter (inch)
0.01
Wire Diameter (mm)
0.20
Wire Diameter - Build Spec (in)
0.01
Hole Diameter - Build Spec. (in)
0.06
Rod Diameter - Build Spec. (in)
0.04
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)
0.13
Material Short Description
MW
Load at Solid Height (lb)
0.80
Load at Solid Height - Build Spec. (lb)
0.80
Load at Solid Height (N)
3.56
Load at Solid Height (kg)
0.36
Load at Solid Height (gm)
362.88
Active Coils - Build Spec.
13.06
Active Coils
13.06
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
Outside Diameter Tolerance (in)
+/-0.003
Outside Diameter Tolerance (mm)
+/-0.08
Outside Diameter Tolerance - Build Spec (in)
+/-0.003
Inside Diameter - Build Spec (in)
0.04
Outside Diameter Lower Tolerance (in)
0.00
Outside Diameter Upper Tolerance (in)
0.00
Outside Diameter Upper Tolerance (mm)
0.08
Outside Diameter Lower Tolerance (mm)
0.08
Model Code
CI

Instrument Compression Series (inch) Compression Springs

Precision Springs for Precision Products .

Lee Spring CI 008A 04 M 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 0.057-inch outside diameter (1.45 mm) with a 0.063-inch hole diameter (1.6 mm) and extends to a free length of 0.313 inch (7.95 mm), making it ideal for instruments and assemblies where consistent and precise compression characteristics are critical. Made from Music Wire with a 0.008-inch wire diameter (0.2 mm), the spring delivers a spring rate of 4 lb/inch (0.701 N/mm) through its 13.06 active coils out of 15.06 total coils for predictable deflection behavior. The spring compresses to a solid height of 0.128 inch (3.25 mm) while supporting a maximum load of 0.8 lb (3.56 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

288281
Product Compression OD 0.057 in, Length 0.313 in, Music Wire
Product Compression OD 1.45 mm, Length 7.95 mm, Music Wire
Part Number CI 008A 04 M
Series Instrument Compression Series (inch)
Outside Diameter (inch) 0.057
Outside Diameter (cm) 0.145
Outside Diameter (mm) 1.45
Hole Diameter (inch) 0.063
Hole Diameter (cm) 0.16
Hole Diameter (mm) 1.6
Rod Diameter (inch) 0.036
Rod Diameter (cm) 0.091
Rod Diameter (mm) 0.91
Free Length (inch) 0.313
Free Length (cm) 0.795
Free Length (mm) 7.95
Rate (gm/mm) 71.43
Rate (kg/cm) 0.714
Rate (kg/mm) 0.0714
Rate (lb/inch) 4
Rate (gm/cm) 714.3
Rate (N/cm) 7.01
Rate (N/mm) 0.701
Solid Height (inch) 0.128
Solid Height (cm) 0.325
Solid Height (mm) 3.25
Wire Diameter (inch) 0.008
Wire Diameter (cm) 0.02
Wire Diameter (mm) 0.2
Material Music Wire
Load at Solid Height (gm) 362.88
Load at Solid Height (kg) 0.363
Load at Solid Height (lb) 0.8
Load at Solid Height (N) 3.56
Ends Squared
Active Coils 13.06
Direction of Wind Factory Option
Finish Pre-coated with Tin
Total Coils 15.06
0.008 0.057 0.003 0.003 0.063 0.036 0.313 0.018 15.06 4 0.4 0.128 0.8 0.008 0.313 0.057 0.2 1.45 0.08 1.6 0.91 7.95 0.457 0.701 3.25 3.56
Default View
Side view
Top view
Quantity Price
1 - 19 $7.680
20 - 49 $4.650
50 - 99 $2.350
100 - 199 $1.510
200 - 299 $1.162
300 - 399 $1.052
400 - 499 $0.953
500 - 599 $0.866
600 - 699 $0.787
700 - 799 $0.723
800 - 899 $0.668
900 - 999 $0.623
1000 $0.589

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