Allstar Performance Arm Bolt for XP Birdcage, 1/2-20 in thread, 2.000 in long, hex head, steel with zinc plating, sold each. This is the torsion arm mounting bolt specified for Allstar's XP aluminum sprint car birdcages.
Spec Sheet: Allstar XP Aluminum Birdcages Spec Sheet
Compatibility
Listed on Allstar's own spec sheet as the arm bolt for its XP birdcages (ALL55038 Left, ALL55039 Right), used along with XP rear torsion arms. For standard or non-wing aluminum birdcages, use the longer 3.5 in Arm Bolt (ALL55055) instead.
FAQ
What birdcage does this bolt fit?
Allstar's spec sheet lists this bolt for its XP aluminum birdcages (ALL55038 and ALL55039), used with XP rear torsion arms.
What size is this bolt?
1/2-20 in thread, 2.000 in long, hex head, zinc-plated steel.
Will this bolt work on a standard (non-XP) birdcage?
No — standard and non-wing aluminum birdcages use the longer 3.5 in Arm Bolt, ALL55055.

