Part 700-678 is a head cap screw used to secure critical components in pump and drive assemblies on compatible sprayers. It provides reliable fastening with a low-profile head design, ensuring proper clamping force and alignment. Replacing worn or damaged cap screws restores secure assembly and helps prevent mechanical failure.
| Part Number | 700-678 |
|---|---|
| Part Description | Head Cap Screw |
| Brand | Airless / Epic / PowrLiner / ProMark / RentSpray |
| Fits | Airless Sprayer 440XC, 550XC, 660XC, 690; Epic 447EX, 447HPX, 660EX, 660HPX, 690GX, 690HPG; PowrLiner 2800, 3100; ProMark II (759-2010); RentSpray 700 |
| Condition | New |
The 700-678 Head Cap Screw is a precision fastener used throughout pump and drive assemblies on compatible sprayers. Its low-profile head design allows for use in tight spaces while providing excellent wrench engagement for proper torque application. It is commonly used to secure motor mounts, pump flanges, bearing caps, and other critical components.
Over time, cap screws can become corroded, have their threads damaged, or experience fatigue from vibration and thermal cycling. A damaged or improperly torqued cap screw can lead to component loosening, misalignment, fluid leaks, or mechanical failure. Replacing worn fasteners with genuine part 700-678 ensures proper clamping force and reliable operation.
| Secure fastening | Holds components together with precise clamping force |
|---|---|
| Alignment maintenance | Prevents shifting of parts that could cause wear or leaks |
| Vibration resistance | When properly torqued, resists loosening from operational vibration |
| Thread damage | Stripped, cross-threaded, or corroded threads |
|---|---|
| Head damage | Rounded drive, worn hex, or deformed head |
| Stretching / fatigue | Screw appears necked down or has visible distortion |
| Corrosion | Rust or chemical attack that compromises strength |
Part 700-678 is used across a wide range of sprayer models. Always confirm fitment using the correct parts manual for your specific machine.
| Brand | Model |
|---|---|
| Airless Sprayer | 440XC |
| Airless Sprayer | 550XC |
| Airless Sprayer | 660XC |
| Airless Sprayer | 690 |
| Epic | 447EX |
| Epic | 447HPX |
| Epic | 660EX |
| Epic | 660HPX |
| Epic | 690GX |
| Epic | 690HPG |
| PowrLiner | 2800 |
| PowrLiner | 3100 |
| ProMark II | 759-2010 |
| RentSpray | 700 |
When replacing cap screws, inspect these associated components to ensure a complete repair.
Check for thread damage or corrosion; replace if necessary to maintain clamping integrity.
If screws secure a sealed joint, inspect and replace gaskets to prevent leaks.
For critical applications, apply medium-strength thread locker per manufacturer specs.
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