This is a Miller Industries control rod end cap. Instead of cotter pins, these end caps hold the control rods in place within the control assembly.
Fits:
Challenger Car Carriers 2002-CurrentCentury 10 Series Steel & Aluminum Carriers 2001-CurrentCentury LCG 12 Series Steel & Aluminum Carriers 2009-CurrentCentury 15 Series Steel & Aluminum Carriers 2005-CurrentCentury LCG 16 Series Steel & Aluminum Carriers 2009-2014Century 20 Series Steel & Aluminum Carriers 2002-CurrentCentury 30 Series Steel Carriers 2005-CurrentChampion Steel & Aluminum Carriers 2001-CurrentHolmes 10 Series Steel & Aluminum Carriers 2001-CurrentVulcan 10 Series Steel & Aluminum Carriers 2001-CurrentVulcan 10 Series Extreme Angle Steel Carriers 2005-CurrentProduct Dimensions: 0.55"L x 0.55"W x 0.3"HOutside Diameter: .55'