28 Spline Adjusters
AUTOMATIC SLACK ADJUSTER (12 1/4″ TRAILER AXLE BRAKES, 5″-6″ ARM, 1 1/2″-28 SPLINE)

Part # SA22953
$77.46
STRAIGHT ARM SLACK ADJUSTER (ARM LENGTH 5,6, TEETH 28, SPLINE DIA. 1.50″, MERITOR)

Part # KN44051
$32.27