Expert Supplier of Wire Forms and Springs for the Hardware and Fasteners Industry
With over 75 years of manufacturing experience, Master Spring is a proven U.S. supplier of wire forms and coil springs for the hardware and fasteners industry.
Made-to-Order Wire Forms and Coil Springs for Hardware and Fastener Applications
We manufacture farming planter springs, gas spout springs, ball plunger springs, POP flip-sign springs, toilet flush handle springs, medical device lock springs, fusible link hooks, sewage pump handles, cash drawer springs, laundry basket truck springs and chill coils.
Link Hook
Part Names: Galvanized steel link hook, fusible link hook, wire hook
Industry: Hardware and fasteners: Fire protection equipment
Application: The wire hook is a fusible link component used in mainstream range hood fire protection systems for both domestic and commercial applications.
Special Features: Eyelet has a small coil index (ratio of mean coil diameter to wire diameter). Eyelet must maintain full radius near cutoff with a gap.
Industry: Hardware and Fasteners; Residential Pumps
Application: The handle is attached to a submersible sewage pump used in residential applications. We also make smaller handles for sump pumps.
Material: 0.250” stainless steel 302 wire
Special Features: Packed 250 pieces per box
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
Flush Handle Spring
Part Names: Stainless steel torsion spring, toilet handle spring
Industry: Hardware and fasteners: Toilet trim products
Application: Torsion spring returns toilet flush handle to starting position
Material: 0.050” type 302 stainless steel wire
Special Features: Inspection report is sent with every shipment and minimum inventory quantity is maintained for immediate release
Coulter Double Torsion Spring
Part Names: Large double torsion spring, farming planter torsion spring
Industry: Hardware and fasteners: Agriculture planter products
Application: Double torsion spring applies force to the coulter in a nitrogen application system for a planter
Material: 0.192” phos music wire
Special Features: Magni-565-coated for corrosion protection
Drain Pan Extension Spring
Part Names: Stainless steel extension spring, extended hook extension spring
Industry: Hardware and fasteners: Employee safety equipment
Application: Used in an eye/face wash and shower safety station; spring keeps recessed drain pan closed in a vertical position
Material: : 0.067” type 302 stainless steel wire
Special Features: : Springs are passivated; center rectangular hook with 11/64” gap on one side; other end has a center extended hook with eyelet that is in-line with other side
Lock Spring
Part Names: Medical device lock spring, needle cartridge spring, stainless steel lock spring
Industry: Hardware and fasteners: Micro needling device used in dermatology
Application: Lock spring is used to lock sterile needle cartridge to handpiece base
Material: 0.020” stainless steel 302 wire
Special Features: Packed 1,000 parts per labeled, double bag
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Chill Coil
Part Names: Sand mold cooling coil, casting chill coil
Industry: Hardware and fasteners: Metal casting
Application: The cooling coil or chill coil is placed in the sand mold to produce local chilling and equalize the rate of solidification throughout the casting
Material: 0.162” C1008 bright basic wire
Special Features: Copper coated
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)
Coupling Double Torsion Spring
Part Names: Stainless steel double torsion spring, snowplow torsion spring
Industry: Hardware and fasteners: Professional snowplow and ice removal equipment
Application: Double torsion spring is used in lock-pin coupling system for attaching a snowplow to a truck
Material: 0.093” type 302 stainless steel wire
Special Features: There is a long amount of wire between the two bodies of coils that includes two wraps of square coils in the center
Flip-sign Torsion Spring
Part Names: Hinge spring, pre-galvanized torsion spring, LH-wound torsion spring
Industry: Hardware and fasteners: Point-of-purchase displays
Application: Torsion spring is used in a flip-up header LED sign in POP displays
Material: 0.057” pre-plated galvanized music wire
Special Features: Torsion spring is left-hand wound
Basket Truck Lift Spring
Part Names: Laundry basket extension spring, large extension spring, side-loop extension spring
Industry: Hardware and fasteners: Laundry and housekeeping basket trucks
Application: Extension springs lift bottom of laundry basket truck as load gets lighter
Material: 0.120” galvanized hard-drawn MB spring wire
Special Features: 45-degree side loops; each loop is two coils and loops are in-line; oval ring is assembled to one loop
Inspection Display Stand
Part Names: Aluminum wire stand, portable display stand
Industry: Hardware and fasteners: Portable ultrasonic flaw detectors for locating and sizing of hidden cracks, voids, disbands, and similar discontinuities in welds, forgings, turbines and other structural components
Applicatoin: Aluminum wire form stand provides convenient, lightweight support to keep portable inspection display upright
Material: 0.250” aluminum wire 6061 T6
Special Features: Chamfer ends, mill flat ends, drill hole in each end and tap, chromate conversion coat, and black plastisol dip coat
Wire Loop Handle
Part Names: Aluminum wire handle, wire loop strap fastener
Industry: Hardware and fasteners
Application: Wire loop handle used as a belt or strap fastener
Material: 0.125” aluminum ¼ hard wire
Special Features: Tumble or vibratory deburr to remove sharp edges
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
Special Features: Coils must be concentric and must screw onto mating part
Seed Tube Retention Spring
Part Names: Large double torsion spring, stainless steel torsion spring, seed tube fastener spring
Industry: Hardware and fasteners: Agriculture planter equipment
Application: Double torsion spring fastens seed tube delivery system to planter row unit
Material: 0.162” type 302 stainless steel wire
Special Features: Large double torsion spring has many bends on both legs
Hairpin Spring Clip
Part Names: Stainless steel clips, ammunition container clips, torsion spring clips
Industry: Hardware and fasteners: Ammunition containers
Application: Hairpin spring clip keeps ammunition container closed
Material: 0.090” type 302 stainless steel wire
Special Features: Material certificate and Certificate of Compliance are sent with every shipment; finish is to remain dull
Currency Hold-down Extension Spring
Part Names: Cash drawer extension spring, cash register extension spring, side-loop extension spring
Industry: Hardware and fasteners: Point-of-sale (POS) heavy-duty cash drawer
Application: Extension springs provide tension on currency hold downs in heavy-duty till
Material: 0.020” galvanized music wire
Special Features: Full side loops in-line
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
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
Vacuum Hose Spring Clamp
Part Names: Clamp spring, torsion spring, vacuum hose clamp spring
Industry: Hardware and fasteners: Dust control systems for automotive, aerospace and industrial applications
Application: Spring clamp mount for holding flex-loc vacuum hose fixed in place
Material: 0.125” hard-drawn bright wire
Special Features: Bright chrome plate
Spring Pin Clip
Part Names: Torsion spring pin assembly, farming planter spring pin clip
Industry: Hardware and fasteners: Agriculture planter equipment
Application: Spring pin assembly fastens the seed tube to the planter
Material: 0.051” zinc pre-plated music wire
Special Features: Torsion springs are assembled with pins and packed four assemblies per heat sealed and labeled bag
Active-coil Helical Extension Spring
Part Names: Trampoline spring, physical therapy rebounder spring, extension spring
Industry: Hardware and fasteners: Physical therapy products
Application: Extension springs return the trampoline mat to starting position in plyometric rebounder
Material: 0.138” phosphate-coated music wire
Special Features: Center hooks in line; gap is 3/8” to 7/16”; finish is zinc trivalent with bake
Seed-meter Singulator Spring
Part Names: Seed meter spring, stainless steel torsion spring, seed meter torsion spring
Industry: Hardware and fasteners: Agriculture seed meters
Application: Torsion spring rides on the edge of a meter disk and knocks off extra seeds so only one seed is planted at a time
Material: 0.036” type 302 stainless steel wire
Special Features: Torsion springs are layer packed to minimize tangling during shipping
Stainless Steel Clothespin Spring
Part Names: Stainless steel torsion spring, artisan clothespin spring
Industry: Hardware and fasteners: Artisan clothespins
Application: Torsion spring applies the strong gripping force in American-made artisan clothespins
Material: 0.062” type 302 stainless steel wire
Special Features: Torsion springs are passivated to remove contaminants and improve corrosion resistance
Extension Spring, .375” OD x 2.5” Long
Part Names: Snowplow extension spring, center-loop extension spring, stainless steel extension spring
Industry: Hardware and fasteners: Professional snowplow and ice removal equipment
Applicatoin: Provides tension on a coupler stop pin on snowplow equipment
Material: 0.049” type 302 stainless steel wire
Special Features: Center loops in line +/- 30 degrees; fully closed loops
Clutch Garter Spring
Part Names: Stainless steel clutch spring, fun-kart clutch spring, small index extension spring
Industry: Hardware and fasteners: Fun-kart and four-cycle racing karts
Application: Extension spring works as a garter spring in an automatic centrifugal clutch on a fun kart
Material: 0.057” type 302 stainless steel wire
Special Features: Extremely small spring index (ratio of mean coil diameter to wire diameter); machine loops (same as German hooks or twist loops); one loop is closed; second loop has a gap
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Master Spring Advantage
Customers select Master Spring to produce parts that are difficult to form, finish or package. We do what other manufacturers can’t.
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.