Part 765-060 is a #10 internal tooth lock washer manufactured from steel (STL). This washer is designed to prevent fasteners from loosening due to vibration during sprayer operation. The internal teeth bite into both the screw head and the mating surface, creating a locking action that maintains clamp load. Replacing missing or damaged lock washers with this genuine part ensures secure fastening and reliable operation of critical components.
| Part Number | 765-060 |
|---|---|
| Part Description | Lock Washer, #10 Internal Tooth, Steel |
| Material | Steel (STL) |
| Size | #10 (Internal Tooth) |
| Brand | Digital Airless / Airless Sprayer / Epic / Speeflo |
| Fits | Digital Airless 1140IX, 840IX; Airless Sprayer 550XC; Epic 447EX, 447HPX; Speeflo PowrTex 1200 SF |
| Condition | New |
The 765-060 #10 internal tooth lock washer is a genuine replacement fastener component used across multiple sprayer models. Despite its small size, this washer plays a critical role in maintaining the integrity of mechanical assemblies by preventing screws and bolts from loosening due to vibration.
Internal tooth lock washers feature teeth that radiate inward, biting into both the underside of the fastener head and the mounting surface when tightened. This creates a spring-like tension and mechanical interference that resists rotational loosening. They are particularly effective in applications subject to continuous vibration, such as sprayer motors, pump mounts, and control panels.
Over time, lock washers can become flattened, corroded, or lost during disassembly. A missing or damaged lock washer can allow fasteners to gradually loosen, leading to component misalignment, increased wear, noise, or even failure of critical assemblies. Replacing worn or missing washers with this genuine steel part restores proper locking action and ensures long-term reliability.
| Vibration resistance | Prevents fasteners from loosening during operation |
|---|---|
| Clamp load maintenance | Maintains tension in the fastened joint |
| Tooth engagement | Internal teeth bite into fastener head and mating surface |
| Spring action | Provides slight spring tension to compensate for settling |
| Flattened / compressed | Washer no longer provides spring tension |
|---|---|
| Corrosion / rust | Rust weakens the washer and can reduce effectiveness |
| Missing | Washer lost during maintenance or operation |
| Broken teeth | Internal teeth are broken or worn smooth |
| Loose fasteners | Recurring loosening of screws in the same location |
| Type | Internal Tooth Lock Washer |
|---|---|
| Size | #10 (fits #10 screw/bolt size) |
| Material | Steel (STL) |
| Finish | Plain / unplated (as original) |
| Inside Diameter | Approximately 0.195" (fits #10 screw) |
| Outside Diameter | Standard #10 internal tooth washer dimensions |
Lock washer 765-060 is compatible with the following sprayer models. Always verify the specific application using the correct parts diagram.
| Brand | Model |
|---|---|
| Digital Airless | 1140IX |
| Digital Airless | 840IX |
| Airless Sprayer | 550XC |
| Epic | 447EX |
| Epic | 447HPX |
| Speeflo | PowrTex 1200 SF |
Lock washers are typically used with these associated fastener components.
The mating fastener that the lock washer is designed for.
Sometimes used in combination with lock washers for specific applications.
Lock washers are also used under nuts in bolted connections.
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