CNC machined hardened spring steel axle

3mm front and rear

use the Hitec HS-77BB

6S and 8S platforms

5mm threaded aluminum links

Kadee #58-25 HO Scale Bulk Pack 25 pair #58 Scale Metal Couplers - Medium 9/32" Blizzard Parts CNC machined hardened spring steel#58 25 HO Scale Bulk Pack 25 pair #58 Scale Metal Couplers Medium (9 32") Centerset Shank. While the No. 5 was revolutionary, the #58 is evolutionary. We took our legendary No. 5 coupler and shrank the size of the head and knuckle to create a coupler that's even more prototypical. These industry leading couplers feature an all metal construction and standard centering springs. This is the perfect upgrade for the weak and drooping couplers that come on