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The Bard 2151-022BX is an OEM 1/2 inch tri-groove socket key supplied boxed, used as a specialty service tool for engaging tri-groove style fasteners found on select Bard HVAC assemblies. This key helps technicians get proper purchase on the fastener for controlled tightening or removal during service and maintenance, which reduces the chance of rounding the drive compared with makeshift tools. Because tool and fastener styles can vary by series and production run, confirm the required key size and fastener type from your Bard unit documentation before ordering to ensure correct fit and safe service access.
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.