The Allied Bolt Cable Suspension Bolt (vendor part 5181, Millennium part 587839) is a 5/8 in x 2-1/2 in center-to-center bolt for mounting clamp fittings at strand crossovers and on steel cable crossarms in aerial line construction. Hot-dip galvanized to ASTM F2329, it resists corrosion through continuous outdoor exposure on messenger and guy strand hardware. Its short length suits tight crossarm hardware stacks compared to Millennium's longer suspension bolt options. Order with matching extension bolts and cable clamps for complete suspension assemblies.