Products

Get unique, complex parts easily. No matter your requirements, Master Spring creates hard-to-produce coil springs and wire forms.

Custom Wire Forms

Let us help you create the custom wire form you need, from S-hooks and J-hooks to utility hooks and more.

Industries

We work closely with customers across a wide range of industries, helping them design and manufacture made-to-order parts.

Master Spring Advantage

Why choose Master Spring? We prioritize customer-focused collaboration, modern equipment and the latest technology to make your parts per print.

Made-to-Order, Custom Compression Springs

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Unique Compression Springs for Many Applications

Master Spring custom manufactures complex, made-to-order compression springs from round wire, including solenoid valve springs, contact springs, filter springs, clamp springs, conical springs, ball plunger springs and more.

Fuel Dispenser Filter Spring

Fuel Dispenser Filter Spring

Part Names: Hourglass compression spring, fuel filter spring, petroleum filter canister coil spring

Industry: Filters for the petroleum, industrial, agricultural, heavy duty, and biofuel markets

Application: Spring holds media in place inside canister

Material: 0.099” hard-drawn bright wire

Special Features: Hourglass-shaped spring; no overlap on ends; packed 1,000 springs per box

Conical Valve Spring

Conical Valve Spring

Part Names: Solenoid valve spring, solenoid spring, conical valve spring, CEG conical compression spring

Industry: Solenoid valves

Application: Compression spring is used inside solenoid valves that control critical flow of air, gas, water, oil or steam

Material: 0.135” phosphate-coated music wire

Special Features: Closed ends and ground; zinc plate

Lockout Bar Spring

Lockout Bar Spring

Part Names: Small compression spring, CEG compression spring, lockout bar spring

Industry: Construction power tools

Application: Prevents unwanted nailing gun cycling when nail magazine is empty

Material: 0.010” stainless steel 302 wire

Special Features: Closed ends and ground; packed 500 parts per bag

conical rebar

Spiral Reinforcement

Part Names: Coiled rebar, conical rebar, concrete spiral reinforcement

Industry: Hardware and fasteners: Railroad track systems

Application: Acts as rebar in railroad concrete sleepers

Material: 0.236” cold-rolled C1008 bright basic wire

Special Features: Coils must be concentric and must screw onto mating part

Contact spring for touch-on, touch-off and hands-free faucets

Contact Spring

Part Names: Electric contact spring, conical spring, stainless steel conical compression spring

Industry: Kitchen and bathroom faucets

Application: Contact spring for touch-on, touch-off and hands-free faucets

Material: 0.024” Stainless Steel 302 Wire

Special Features: Conical spring with bottom end kicked in. Closed ends and not ground. Packed on tack board to prevent tangling.

Stainless steel compression spring,

Spout Spring

Part Names: Stainless steel compression spring, stainless CENG compression spring, flow control button spring

Industry: Hardware and fasteners: Portable plastic fuel containers

Application: Flow control button for pouring gas

Material: 0.059” stainless steel 302 wire

Special Features: Closed ends and not ground

Ball-Check Valve Springs

Ball-check Valve Spring

Part Names: Stainless steel compression spring, CENG compression spring, ball-check valve spring

Industry: Agriculture spray boom components

Application: Minimizes nozzle drippings on agricultural sprayers

Material: 0.031” stainless steel 302 wire

Special Features: Double closed ends and not ground

CENG stainless steel compression spring

Clamp Spring

Part Names: CENG stainless steel compression spring, rail clamp spring, clamp compression spring

Industry: Solar power mounting systems

Application: Clamp spring assembly for mounting solar panels to rails

Material: 0.028” stainless steel 302 wire

Special Features: Closed ends and not ground

4 Barrel compression springs

Positive Contact Spring

Part Names: Barrel compression spring, tin-plated coil spring battery contact, positive contact spring

Industry: Electronics

Application: Positive contact spring used in audio equipment

Material: 0.030″ Phos Music Wire

Special Features: Barrel-shaped springs; strung onto wire to prevent tangling during tin-plating process

Chamber Return Springs

Chamber Return Spring

Part Names: Return spring, chamber return spring, CEG compression spring

Industry: Construction power tools

Application: Compression spring returns chamber to starting position after nailing gun

Material: 0.030” phos music wire

Special Features: Closed ends and ground, electroless nickel plate, packed 500 pieces per bag

barrel-shaped compression spring

Barrel Compression Spring

Part Names: Plunger spring, barrel-shaped compression spring

Industry: Hardware and fasteners: Pinball games

Application: Used on plunger assembly

Material: 0.062” phos music wire

Special Features: Bright nickel rack plate

In-pipe diagnostic camera spring

Camera Spring

Part Names: Coil spring, plumbing camera spring

Industry: Plumbing tools

Application: In-pipe diagnostic camera equipment for plumbing applications

Material: 0.095” 17-7 PH stainless steel wire

Special Features: Spring end is chamfered; electropolished to a bright finish

Close wound coil springs

Hourglass Spring

Part Names: Close wound coil spring, hourglass spring

Industry: Plumbing tools

Application: In-pipe diagnostic camera equipment for plumbing applications

Material: 0.138″ 17-7 stainless steel condition C wire

Special Features: Coils wound tightly together

CENG stainless steel compression springs

Metering Valve Spring

Part Names: CENG stainless steel compression spring, metering valve spring, fuel cartridge spring

Industry: Construction power tools

Application: Pressurized gas cartridge or canister

Material: 0.024” stainless steel 302 wire

Special Features: Closed ends and not ground

Yoke Spring Guide Assembly

Yoke Spring Guide Assembly

Part Names: Yoke spring, CENG compression spring

Industry: Construction power tools

Application: Compression spring for yoke in combustion chamber of nailing gun

Material: 0.020” pre-plated galvanized music wire

Special Features: Closed ends and not ground, plastic spring guide is assembled to end of spring, packed 500 pieces per bag

Chrome silicon compression spring

Metal Insert

Part Names: Chrome silicon compression spring, CEG compression spring, metal insert for tube seal

Industry: Hardware and fasteners: Tube seals used in automotive transmissions

Application: Over molding a rigid insert (compression spring) adds stability to automotive transmission tube seal and prevents buckling

Material: 0.038” chrome silicon wire

Special Features: Three-coil closed ends and ground; zinc phosphate coating; packed 10,000 pieces per bag in a box

Stainless steel ball plunger spring

Ball Plunger Spring

Part Names: Stainless steel ball plunger spring, CENG compression spring

Industry: Hardware and fasteners: Ball and spring plungers and hand retractable spring plungers

Application: The compression spring is enclosed in a threaded capsule and provides accurate and repeatable spring end forces through a ball or rounded nose

Material: 0.028” stainless steel 302 wire

Special Features: Closed ends and not ground (CENG); set removed (i.e., the spring’s free length decreases after deflecting to solid height)

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Compression Spring Capabilities

As an industry-leading compression spring manufacturer, we are your one-stop source for precision, custom compression springs in a wide range of spring body shapes and wire sizes. Learn about our extensive compression spring production services—from grinding to rapid prototyping, special packaging, assembly services and more.

QUICK CHANGES TO BODY SHAPES

Master Spring has the machinery and skills to quickly change compression or helical springs to meet your custom requirements. With the ability to control outside diameter and pitch coil by coil, we can manufacture all body shapes (conical or tapered, barrel, hourglass, or straight cylindrical), customize the space between coils for constant or variable pitch, create open or closed ends (end coils with space between or with ends that touch), and customize springs with left or right hand coil direction and unlimited free length.

Body shapes including helical springs, conical springs, and more

Helical, Conical Springs and More

SPRING GRINDING CAPABILITIES

Your compression spring ends may be ground to decrease the solid height of the spring and/or to help the spring stand up straight to reduce buckling during operation. We normally supply squared and ground compression springs with a bearing surface of 270º to 330º. We have experience grinding the ends of many different sizes and shapes of compression springs. Master Spring machines the custom grinding block fixtures to support the springs as they pass between the grinding wheels. With our LED 3D camera inspection equipment, we monitor the free length, squareness (perpendicularity) and parallelism of your closed- and ground-end helical springs.

Compression springs with ground ends

Compression Springs with Ground Ends

ENGINEERING SUPPORT

Need help creating a new design or solving a problem with your existing compression spring? Looking for help engineering a solenoid valve spring? Our engineers use a spring design software to review your compression spring for functionality and manufacturability and look for improvements and cost savings. We check if the spring has too much stress in its deflection range and if the spring’s design meets your required tolerances. In addition, we determine if the estimated life cycle is greater than you need, if the spring will fit in the hole or around the shaft and if there are any other design warnings.

With over 75 years of custom compression spring manufacturing experience, we solve the toughest challenges. Contact us if you need samples quickly or to set up a discussion with a knowledgeable engineer to review and advise on your design.

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SPECIAL PACKAGING

Master Spring tailors compression spring packaging to meet your unique assembly line and finished product needs. Our custom packaging solutions include tangle-free packing for efficient assembly operations, a pre-determined standard quantity per bag and individually bagged and labeled parts ready to ship to your customers.

Contact us today for more information about our compression spring special packaging services.

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Coil springs on a tack board battery connector to prevent tangling

Tack Board Battery Connector

A small bag of custom coil springs with black finish

Small Bag of Custom Coil Springs

Helical springs strung on wire loops to prevent tangling

Helical Springs Strung on Wire Loops

Custom wire forms zip tied in bundles

Zip Tied Wire Forms

Wire clips nested in two labelled cardboard boxes

Nestled Wire Form Clips

Multiple springs layer-packed to minimize tangling

Multiple Springs Layer-packed

An individually bagged and labelled custom spring clip

Individually Bagged Spring Clips

ASSEMBLY SERVICES

Let Master Spring’s compression spring assembly services lower your production costs by reducing the components you need to purchase and inventory. We can assemble your custom compression spring with its mating part and send the sub-assembly to you.

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Two wire forms assembled together to create a wire spring latch

Wire Spring Latch

Oval loop assembled to a custom extension spring

Oval Loop Assembled to Extension Spring

Milk Frother

Heat shrink with a black rubber sleeve on a retainer spring

Rubber Sleeve on Retainer Spring

Ball chains assembled to a wire form

Ball Chains Assembled to Wire Form

A trotline clip with a brass swivel hook

Trot Line Clip

Copper clasp assembled to a custom wire form to create a pull pin

Copper Clasp Assembled Pull Pin

Torsion spring assembled to a plastic molded trigger

Torsion Spring Assembled to Molded Trigger

DOCUMENTATION, CERTIFICATES AND COMPLIANCE

Master Spring’s experience and quality process provide the documentation you require for your compression springs.

We have experience providing a Production Part Approval Process (PPAP) to our customers. After receiving our PPAP report, you can assess our process stability, review our controls to provide conforming product and have an approval outlet for any compression spring design changes.

We create a First Article Inspection Report (FAIR) for each production run. The FAIR indicates the nominal dimensions, tolerances, precise measurements and methods of measurement for a requested quantity. Each FAIR provides a record of the raw material heat number to provide traceability to the batch of wire used for each production run.

Upon request, we can include certificates of compliance, material certificates and finishing certifications with each shipment of compression springs.

Strict vendor management and lot control enable us to comply with regulatory compliances, including Conflict Minerals, DFARS, REACH, RoHS or California Prop 65. Let us know your documentation, certificate and compliance requirements when you request a quote.

WIRE DIAMETER RANGE

Our CNC coiling machines coil a wide range of wire sizes so we can manufacture both small and large compression springs. With full CNC control of all axes, our machines can manufacture precise, custom compression springs with wire diameters as small as 0.006” or as large as 0.276” (0.15mm to 7mm), and any size in between.


We have invested in a large inventory of compression spring tooling to cover the wire diameter range for each coiling machine.

WIRE MATERIAL TYPES

Master Spring maintains strong relationships with local, qualified wire distributors and mills that offer quality wire to meet your specifications. We have years of experience making custom compression springs from many different material types:

High-carbon Spring Steel Wire : Hard-drawn wire, music wire and oil-tempered

Stainless Steel Wire: 302, 304, 316 and 17-7 PH

Alloy Steel Wire: Chrome silicon

Non-ferrous Alloy Wire: Phosphor bronze, beryllium copper, brass, Monel

High-temperature Alloy: Inconel

Special Purpose Alloy: Elgiloy, MP35N, Hastelloy C276

Non-ferrous Metal: Copper, Tinned Copper (Buss), Aluminum, Nickel

*Some of the carbon wire types can be pre-plated with a galvanized, zinc-coated finish, a tin-coated finish or Bezinal®-coated finish.

Properties of Materials Guide

Looking for information about common materials used in compression springs? Explore our guide to learn about nominal chemistry, minimum tensile strength, maximum operating temperatures, Rockwell hardness and suitable uses for each material.

Explore the Guide

COMPRESSION SPRING FINISHINGS

To complete your custom compression springs, we offer an extensive variety of finishing types. We manage a strong network of local, qualified vendors who offer quality finishes, short lead times and competitive pricing. Learn more about our finishing services below.

Wire forms on a conveyor belt receiving in-line stress relief

In-house Stress Relief

We use in-line ovens at each coiling machine to apply low-temperature stress relief. This process alleviates residual stresses produced by prior cold coiling and improves the compression spring’s shape memory to maintain its coiled shape.

Five compression springs with shot peen finishing

Shot Peen

Shot peening improves resistance to fatigue, prevents cracking and increases lifecycle. The shot peening process blasts the surface of the wire with steel or glass pellets to create deformations. Our local, qualified vendors specialize in quality shot peening and surface preparation.

Three torsion springs that received tumble deburr treatment

Tumble

Tumbling improves surface finish by removing unwanted sharp edges and burrs from standard machine cuts.

Six wire forms with black oxide plating

Plate

Our large network of qualified platers provides a wide range of plating finishes such as black oxide, zinc, nickel, tin, trivalent chromate and many more finishes in a variety of colors.

Coil springs and wire forms with powder coat finishing

Powder Coat

Numerous powder coat colors are available for compression springs.

Coil springs with passivate finishing in before and after stages

Passivate

An acid treatment for stainless steel, passivation removes contaminants and improves corrosion resistance. We recommend passivating stainless steel compression springs used in the medical and food industries.

Custom springs with electropolish finishing in before and after stages

Electropolish

Electropolish brightens, removes burrs and passivates. For best results, use it on 300-series stainless steel types.

Coil spring types with in-house dye and paint finishes

In-house Dye or Paint

Color coding helps identify and distinguish similar parts in your assembly line. We use an environmentally safe, water-based polymer coating. This coating adheres to the compression spring in-line immediately after oven stress-relief.

Two custom coil springs with e-coat finishing in black

E-coat

E-coat is an electrically applied paint coating that is used as a decorative or protective finish. It enhances appearance while also protecting the surface of compression springs.

Custom wire forms with Magni 525 coat finishing in before and after stages

Magni Coat

Magni coat is a thin, paintable coat that provides exceptional corrosion protection in extreme environments. It is superior to zinc-plating.

Two wire forms with black plastic coating, called plastisol

Plastic Coat

We can add a plastic coating to your compression springs in a variety of available colors.

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CUSTOMER SUCCESS STORY

Custom Compression Spring for the Fuel Dispenser Filter Industry

See how we combined our advanced CNC coiling capability, engineering expertise and monitoring and control to manufacture a better compression spring using less material.

Master Spring Advantage

With expert engineering assistance, coiling machines that can easily change spring body shapes, in-line camera monitoring and sorting, and the latest design software tools, we make it possible to manufacture complex compression springs.

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CUSTOMER-FOCUSED COLLABORATION

  • Engineering assistance to overcome compression spring design obstacles and offer you a solution
  • Skilled machine setup technicians who can meet your unique compression spring dimensions
  • In-house, experienced tool makers who design and manufacture custom tools, grinding block fixtures and gauges
  • Custom-tailored packaging, assembly and finishing services

STATE-OF-THE-ART MACHINES

  • All-servo, high-speed CNC coiling machines that can coil all body shapes with the ability to quickly change outside diameter and pitch coil by coil
  • Coiling machines with in-line cameras and sorters to automatically monitor dimensions of each individual compression spring
  • CNC milling machines to custom manufacture compression spring grinding block fixtures
  • LED 3D camera inspection equipment to quickly and precisely measure free length, coil diameters, squareness (perpendicularity) and parallelism of your closed- and ground-end compression springs
  • Spring testers to measure compression spring loads and rates

CURRENT TECHNOLOGY FOR INCREASED EFFICIENCY

  • JobBOSS ERP software to integrate quoting, job routing, purchase orders, shipping and invoicing
  • Spring Manufacturers Institute’s Advanced Spring Design Software to review your compression spring’s design and recommend improvements
  • SOLIDWORKS CAD software for a collaborative design process
  • MasterCAM software to design and manufacture tooling, grinding fixture blocks and gauges
  • Dozuki video software to document and standardize work instructions for repeat setups
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Contact Master Spring

Need a custom wire form or coil spring? We make it work. Fill out the contact form and a representative will respond within 1 business day. If you have a PDF or CAD file, you can submit to request a quote.

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Your Team For Innovative Wire Forming

We provide solutions for complex, high-quality
wire forms and coil springs.

78 Congress Circle West Roselle, IL 60172

P: 708.453.2570 | F: 708.453.6420 | Contact Us