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Three silver spring steel rods 0.250 in diameter 36 in long in plastic bag

K & S Precision Metals

K & S Precision Metals industrial wire

SKU CH-58FV-9RQ7W

Three 36-inch lengths of 0.250-inch spring steel wire for armature binding, control linkages and spring manufacturing

  • Product typeBuilding Wire
  • Spring-steel strength rated 300 000 to 335 000 PSI for demanding wire forms
  • Meets ASTM A228 standard ensuring reliable industrial performance
  • Tight ±0.001 in diameter tolerance supports precision control linkages
  • Three 36 in lengths per pack give versatile armature-binding stock
  • 5 lb package weight allows easy handling in workshop environments

Precision Music Wire for Industrial Use

This K & S Precision Metals wire is spring steel music wire supplied in three 36 in lengths with a 0.250 in diameter. It meets ASTM A228 and carries a minimum tensile strength of 300 000 to 335 000 PSI. The material suits armature binding, control linkages, spring manufacturing and general industrial wire forms. Builders needing a different diameter or a coated finish should look elsewhere.

Replaces Softer or Uncertified Wire Stock

The 300 000 to 335 000 PSI tensile range and ASTM A228 compliance mark a clear step up from unrated spring wire or lower-grade carbon steel that cannot guarantee consistent springback. The jump is worth it when repeatable fatigue life and tight 0.001 in thickness tolerance are required for precision springs or linkages. Projects that do not need certified tensile data will not benefit from the added specification.

Straightforward Cutting

The wire cuts cleanly with hardened snips or a fine-tooth hacksaw and bends predictably on a mandrel or in a small vice. Springback is strong, so over-bend slightly to reach the target angle. The main issue is surface marring from rough jaws; use nylon-faced pliers or wrap the wire to keep the finish intact. The 2.5 lb pack ships in a plastic bag with no spool, so plan storage to avoid kinks.

How it compares

Measured against everything we stock in Wire, Cable & Wiring Supplies, at today’s prices. Recalculated every night.

Price $11.99
Cheaper than about 70% of the 1,610 comparable items (median $25.99).

Specifications

Product
Brand nameK & S Precision Metals
Product typeBuilding Wire

Questions about this item

Will the 0.250 in diameter music wire fit through a standard quarter-inch hole?

The wire is 0.250 in thick with a tolerance of +/- 0.001 in, so it may be a tight press fit in a nominal quarter-inch hole; a slightly larger bore is recommended for free movement.

How do I cut and form the spring steel wire without cracking it?

Use a fine-tooth hacksaw or abrasive cutoff wheel to cut the 36 in lengths, then bend gradually over a mandrel; spring steel work-hardens quickly, so avoid sharp bends or repeated flexing at the same point.

Will the music wire rust if used for outdoor control linkages?

The spring steel meets ASTM A228 but has no coating; it will corrode in moisture, so apply a protective finish or lubricant and inspect periodically for surface rust.

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