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Specifications

 

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Imperial/Inches Metric
Physical Dimension

mm cm

Load

N kg gm

 
 

CI 008BC 03M

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
6.510
Product Series
Published Stock Code
CI008BC03M
Product Type
Compression Spring
Product Category
Stock
Revision
NR
Rate (N/mm)
0.38
Rate (kg/cm)
0.38
Rate (lb/in)
2.14
Rate (gm/mm)
38.27
Weight per Item (lb)
0.00
Material Specification
ASTM A228
Free Length (cm)
0.635
Free Length (inch)
0.250
Free Length (mm)
6.350
Free Length - Build Spec (in)
0.25
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)
0.28
Hole Diameter (inch)
0.11
Hole Diameter (mm)
2.77
Inside Diameter (cm)
0.20
Inside Diameter (in)
0.08
Inside Diameter (mm)
1.98
Outside Diameter (cm)
0.239
Outside Diameter (in)
0.09
Outside Diameter (mm)
2.39
Outside Diameter - Build Spec (in)
0.09
Rate (gm/cm)
382.70
Rate (kg/mm)
0.04
Rate (N/cm)
3.75
Rate - Build Spec (lb/in)
2.14
Rate Tolerance (gm/cm)
38.22
Rate Tolerance (gm/mm)
3.82
Rate Tolerance (kg/cm)
0.04
Rate Tolerance (kg/mm)
0.00
Rate Tolerance (lb/in)
0.21
Rate Tolerance (N/cm)
0.38
Rate Tolerance (N/mm)
0.04
Rate Tolerance - Build Spec (lb/in)
0.21
Rod Diameter (cm)
0.18
Rod Diameter (inch)
0.07
Rod Diameter (mm)
1.78
Solid Height (cm)
0.15
Solid Height (inch)
0.06
Solid Height (mm)
1.52
Total Coils - Build Spec
6.51
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)
0.11
Rod Diameter - Build Spec. (in)
0.07
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)
0.06
Material Short Description
MW
Load at Solid Height (lb)
0.41
Load at Solid Height - Build Spec. (lb)
0.41
Load at Solid Height (N)
1.81
Load at Solid Height (kg)
0.19
Load at Solid Height (gm)
184.62
Active Coils - Build Spec.
4.51
Active Coils
4.51
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)
0.08
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 008BC 03M 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 0.094-inch outside diameter (2.39 mm) with a 0.109-inch hole diameter (2.77 mm) and extends to a free length of 0.25 inch (6.35 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 2.143 lb/inch (0.375 N/mm) through its 4.51 active coils out of 6.51 total coils for predictable deflection behavior. The spring compresses to a solid height of 0.06 inch (1.52 mm) while supporting a maximum load of 0.407 lb (1.81 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

289121
Product Compression OD 0.094 in, Length 0.25 in, Music Wire
Product Compression OD 2.39 mm, Length 6.35 mm, Music Wire
Part Number CI 008BC 03M
Series Instrument Compression Series (inch)
Outside Diameter (inch) 0.094
Outside Diameter (cm) 0.239
Outside Diameter (mm) 2.39
Hole Diameter (inch) 0.109
Hole Diameter (cm) 0.277
Hole Diameter (mm) 2.77
Rod Diameter (inch) 0.07
Rod Diameter (cm) 0.178
Rod Diameter (mm) 1.78
Free Length (inch) 0.25
Free Length (cm) 0.635
Free Length (mm) 6.35
Rate (gm/mm) 38.27
Rate (kg/cm) 0.383
Rate (kg/mm) 0.0383
Rate (lb/inch) 2.143
Rate (gm/cm) 382.7
Rate (N/cm) 3.75
Rate (N/mm) 0.375
Solid Height (inch) 0.06
Solid Height (cm) 0.152
Solid Height (mm) 1.52
Wire Diameter (inch) 0.008
Wire Diameter (cm) 0.02
Wire Diameter (mm) 0.2
Material Music Wire
Load at Solid Height (gm) 184.62
Load at Solid Height (kg) 0.185
Load at Solid Height (lb) 0.407
Load at Solid Height (N) 1.81
Ends Squared
Active Coils 4.51
Direction of Wind Factory Option
Finish Pre-coated with Tin
Total Coils 6.51
0.008 0.094 0.003 0.003 0.109 0.07 0.25 0.018 6.51 2.143 0.214 0.06 0.407 0.008 0.25 0.094 0.2 2.39 0.08 2.77 1.78 6.35 0.457 0.375 1.52 1.81
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 $1.149
300 - 399 $1.031
400 - 499 $0.928
500 - 599 $0.836
600 - 699 $0.755
700 - 799 $0.683
800 - 899 $0.624
900 - 999 $0.579
1000 $0.543

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