COVID-19 Communication: as per State of Illinois
As an essential supplier we will remain OPEN and provide critical
infrastructure as per the Department of Homeland Security
COVID-19 Communication: as per State of Illinois
As an essential supplier we will remain OPEN and provide critical
infrastructure as per the Department of Homeland Security

Custom Springs

Assorted Springs
Assorted Springs

At Jackson Spring Mfg. Co. Inc., we manufacture premium quality custom springs that are used in a variety of applications. Spring types we produce include compression, extension, and torsion springs made from SAE or ASTM grade steel, stainless steel, or copper. Manufacturing capabilities include the custom fabrication of everything from standard barrel springs to complex variable pitch designs for the automotive, medical, firearms, and other manufacturing industries.

Our dedication to quality is backed by our IATF 16949:2016 & ISO 9001:2015 certification and a company history that dates back to 1962. We are proud members of the Chicago Association of Spring Manufacturers as well as the Spring Manufacturers Institute and strive to continually evaluate and improve our manufacturing processes. A full in-house grinding department allows us to produce custom springs and wire forms to precision tolerances while minimizing costs. For high volume applications, lights out manufacturing methods can be applied to expedite production and minimize labor costs.

Coating and surface treatment options include passivation, zinc plating, black oxide, and color coating. Vision inspection systems and load cells are used to verify conformance to all customer specifications. Lead times are average 3 to 4 weeks, with rush production and JIT delivery services available as needed. For additional information about our custom spring manufacturing capability, see the table below, or contact us directly.

Custom Spring Highlights

Type of Spring (Primary)
Wire Forms
Type of Spring (Secondary)
Constant force (Clock Springs)
Spring Clip
Magazine Springs
Variable pitch
Flat Strip Form
Wire Form
Spring End Types
Closed End Ground
Closed End Unground
Double Torsion
Open End Ground
Open End Unground
Short Hook
Straight Offset
Straight Torsion
Direction of Helix
Spring Materials
Stainless Steel
Alloy Steel
Spring Material Grades
Carbon Steel:
  • ASTM A229 (Oil Tempered MB Grade)
  • SAE 1080 (Oil Tempered GB Grade)
  • ASTM A227 (Hard- Drawn MB grade)
  • ASTM A228 (Music Wire)
  • SAE 1074 (Blue Tempered or Annealed)
  • SAE 1064 (Blue Tempered or Annealed)
  • SAE 1070 (Blue Tempered or Annealed)
  • SAE 1095 (Blue Tempered)

Alloy Steel:

  • ASTM A231 (Chromium Vanadium)
  • ASTM A401 (Chromium Silicon)
  • ASTM A313 ( Stainless )
  • SAE 51414 (Stainless)
  • SAE 51420 (Stainless)
  • SAE 51431 (Stainless)


  • ASTM B 134 (Spring Base)
  • ASTM B 159 (Phosphor Bronze)
  • ASTM B 197 ((Beryllium copper)
Black Oxide
Cleaned & Oiled
Zinc Plate
CNC Machinery
Compression Spring Coiler
Mechanical Coiler
CNC Coiler
Additional Services
CAD Design
Color Coating
Production Volume
Specialty Production Shop
Long Runs
High Volume
Typical Lead Time
3-4 Weeks Job to Job Basis
Rush Services Available
Emergency Services Available
JIT Deliveries

Additional Information

Industry Focus
Fluid Sealing
Fire Arms
Industry Standards
CASMI - Chicago Association of Spring Manufacturers, Inc.
SMI - Spring Manufacturers Institute
IATF 16949:2016 & ISO 9001:2015 - International Organization for Standardization

ITAR Registered

Lights Out Manufacturing
File Formats
IGES - Initial Graphics Exchange Specification, ANSI file format.
PDF - Portable Document Format
STEP - Standard for the Exchange of Product Model Data