The 123.282318.04 is a right-hand S-camshaft with a 1½″ diameter, 28-spline journal, designed for 16½″ trailer drum brake systems such as Spicer XL and Q-style brakes. It measures 23 9⁄16″ (≈23.563″) overall and includes a hardened cam head and single groove journal.
Automann Right Handed 23-9/16 in, 28 Spline Camshaft
$82.86
S-Cam RH 23-9/16 in x 1-5/8 in x 1-1/2 in 28 Spline