4130 steel axles heat-treated for strength and with rolled threads for easy assembly.
| Length | 110, 137, 141, 146, 155, 174, 180, 187 |
| Threading | 10 x 1, 10 x 26tpi, 9 x 1, 9.5 (3/8") x 24tpi, 9.5 (3/8") x 26tpi |
