The Dana Spicer SL221/8 or SL2218 is a 5/8 UNF axle nut designed for on-highway axle applications. Spicer specifies this as a single-unit service part, so you get an exact-fit replacement without adapting a generic fastener to a precision axle application. The 5/8 UNF thread designation means a fine-thread form, which is standard for wheel-end and axle hardware that sees high clamping loads and vibration. Pro Gear and Transmission stocks genuine Spicer components for fleet shops and independent mechanics who need the correct hardware the first time. Call us to confirm this nut fits your specific axle configuration before ordering.
Features
Genuine Dana Spicer part number SL221/8 or SL2218
5/8 UNF (fine-thread) specification
Designed for on-highway axle applications
Sold individually as a single-unit service part
Direct OEM replacement for precision axle hardware
Tech Specs
- Thread: 5/8 UNF
- Application: On-highway axle
- Sold as: Each
