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Bard 5603-007BX - Natural Spring Kit

Bard 5603-007BX is an OEM natural spring kit, boxed for service, used in Bard wall mounted HVAC equipment where a matched spring set is required to restore proper tension and reliable operation of the associated mechanism during service or repair. Using the correct Bard spring kit helps prevent binding, rattles, and premature wear that can happen when incorrect springs are substituted. Confirm fit by matching the full part number to your unit model and serial information or the correct Bard parts manual before ordering.


  • Technical Specifications
  • Product number: 5603-007BX
  • Manufacturer description: Nat. Spring Kit Boxed For Service
  • Weight: 0.100 lbs
  • HTS Code: "8415.90.8085"

  • Previous Versions
  • 5603-007 (Obsolete, superseded by 5603-007BX)

$43.00 *

* Orders less than $50 may incure a minimum order fee.

What does the "BX" suffix mean?

Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.

A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.

Example: 8406-142BX is physically identical to 8406-142.