13990071 – Wright Belleville Washer, M7 × 0.066 (Genuine Wright OEM Part) The Wright 13990071 is a genuine OEM Belleville (conical spring) washer, designed to provide controlled spring tension, vibration resistance, and consistent clamping force in compatible Wright lawn and turf equipment. This washer is commonly used where maintaining preload is critical, such as in assemblies exposed to vibration, thermal expansion, or cyclic loading. Manufactured to Wright original equipment specifications, the Belleville washer is produced from high-strength spring steel and engineered to retain its conical shape under load, ensuring reliable performance over time. Using a genuine Wright Belleville washer ensures correct fitment, proper spring characteristics, and factory-approved fastening reliability. Product Details Manufacturer Part Number: 13990071 Brand: Wright Part Type: Belleville Washer (Conical Spring Washer) Size: M7 Thickness: 0.066 System: Fastening / hardware system Function: Provides spring preload and resists loosening Material: High-strength spring steel OEM Status: Genuine Wright OEM replacement Function Maintains consistent clamping force under vibration Compensates for thermal expansion and component settling Helps prevent fastener loosening Provides controlled spring action in critical assemblies Compatible With The Wright 13990071 Belleville Washer is used on select Wright equipment, including: Wright stand-on mowers Wright commercial lawn and turf equipment Wright assemblies requiring M7 conical spring washers (Exact compatibility depends on the specific Wright model and fastening location.) How It’s Used This Belleville washer installs between the fastener head or nut and the mating surface, with the conical shape oriented according to Wright assembly specifications. When tightened, it compresses to provide spring tension that maintains preload during operation. Correct orientation and torque are essential for proper performance. Suggested Maintenance Inspect Belleville washers during service for flattening or cracks Replace washers that have lost their conical shape Do not reuse washers showing fatigue or deformation Use only OEM-specified Belleville washers to maintain correct preload The Wright 13990071 Belleville Washer (M7 × 0.066) is used in OEM-specified Wright fastening systems where vibration resistance, preload control, and long-term fastening reliability are essential.
