1" round trailer axle spindle washer — the flat washer that sits between the spindle nut and the outer bearing on trailer axle hubs. This washer distributes clamping force evenly across the bearing and prevents the nut from contacting the bearing race directly. Essential for proper bearing preload. ⚙️ Key Features 1" Inside Diameter: Fits standard 1" trailer axle spindles (2K-3.5K axles) Hardened Steel: Resists deformation under spindle nut torque Precision Flat: Even load distribution across bearing race 📐 Specifications Inside Diameter: 1" Application: Spindle washer between nut and outer bearing 🔧 For 2,000-3,500 lb trailer axles with 1" spindles. Replace if bent, worn, or grooved during bearing service. 📞 Call/Text: 517-225-1991 🌐 AAATrailer.com