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Seven silver spring-steel rods 0.156 in. diameter in a clear plastic bag

K & S Precision Metals

K & S Precision Metals 508 Music Wire 0.156 in. 7 pk

SKU CH-9AVJ-GR7A7

Seven 36-inch spring-steel rods meet ASTM A228 with a 0.156-inch diameter and 300,000–335,000 PSI tensile strength

  • TypeNew
  • Spring-steel wire rated at 300 000 to 335 000 PSI tensile strength
  • Meets ASTM A228 specification for consistent spring performance
  • Diameter held to 0.156 in with ±0.001 in tolerance
  • Seven pieces supplied for armature binding, linkages or custom springs
  • Packaged in a plastic bag for clean storage and handling

Spring Steel Wire for Precision Work

K & S Precision Metals 508 Music Wire supplies seven lengths of spring steel suited to armature binding, control linkages, manufacturing springs and other wire-form tasks. Each piece measures to a 0.156 in. thickness with a +/- 0.001 in. tolerance and meets ASTM A228 requirements. The pack targets hobbyists, model engineers and light-industrial users who need consistent tensile performance.

Material Behaviour Under Load

The wire delivers a minimum tensile strength of 300,000 to 335,000 PSI, so it resists permanent deformation during normal forming and cycling. Spring steel composition gives predictable elastic return without specialised heat-treat equipment. No active cooling or lubrication is required for typical bench operations.

Ready-to-Use Lengths in a Single Bag

Seven straight pieces totalling 36 inches arrive in a plastic bag weighing 2 lb, eliminating the need to cut coil stock to length. The pre-counted pack reduces scrap and lets builders start fabrication immediately. No additional tooling, software or surface treatment is included.

Highlights

  • Spring-steel wire rated at 300 000 to 335 000 PSI tensile strength
  • Meets ASTM A228 specification for consistent spring performance
  • Diameter held to 0.156 in with ±0.001 in tolerance
  • Seven pieces supplied for armature binding, linkages or custom springs
  • Packaged in a plastic bag for clean storage and handling

Specifications

BrandK & S Precision Metals
Model508
TypeNew

Questions about this item

How do I cut the 0.156 in. diameter music wire cleanly without damaging the spring steel?

Use a fine-tooth hacksaw or rotary tool with a cut-off wheel, then deburr the ends with a file; the +/- 0.001 in. tolerance means the wire fits tight jigs, so keep cuts square to avoid binding in armature binding or control linkages.

Will the spring steel wire lose its temper or corrosion resistance over time in a workshop environment?

The wire meets ASTM A228 with 300,000 to 335,000 PSI tensile strength; it does not require heat treatment for spring use, but bare spring steel can rust — apply a light oil or clear coat if the finished spring or linkage will see humidity.

At what point does the 36 in. total length across seven pieces become the limiting factor for a production run of custom springs?

Each piece averages just over 5 in., so the limit appears when a single spring design needs more than one full length; plan layouts to nest coils within the 36 in. total to avoid splicing, which would weaken the 300,000 PSI minimum tensile rating.

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