Start with the reference
The most reliable starting point is a verified reference part number from your catalog. It anchors every other specification and reduces ambiguity between similar-looking arms.
Where no reference exists, a drawing, a measured sample or clear photographs with dimensions can support the specification process.
Confirm position and configuration
State whether the arm is upper or lower, front or rear, and left or right. Many arms look symmetrical but are side-specific.
Note the arm shape and the number of mounting points, especially on multi-link rear suspensions.
Check the interfaces
Bushing interfaces: size, orientation and whether the bushings are included.
Ball joint interfaces: integrated, riveted or bolted, plus stud taper and thread.
Document your requirements
Packaging, labeling, inspection expectations and quantities should be shared early. Clear requirements lead to a faster, more accurate quotation.