Graco 15D256 Socket Head Cap Screw – Heavy‑Duty Fastener
The Graco 15D256 Socket Head Cap Screw is a robust, OEM‑specified fastening component engineered for critical assemblies within high‑pressure sprayers and hydraulic modules. Designed for durability, this cap screw ensures long‑term stability where reliable mechanical connection is essential for performance and safety.
Key Features
- Precision‑machined socket head design for accurate torque application
- Hardened alloy construction for superior strength under heavy loads
- Corrosion‑resistant finish and material for extended service life in tough environments
- OEM part — assures exact fit in Graco’s pump and hydraulic motor assemblies
- Optimised for installations where vibration, pressure and maintenance‑load cycles are common
Technical Specifications
| Part Number |
15D256 |
| Description |
Screw, cap, socket head |
| Application |
Critical structural fastening in Graco hydraulic/pump assemblies |
| Head Type |
Socket (internal hex drive) |
| Material & Finish |
Hardened alloy steel with corrosion‑resistant coating |
Applications & Compatibility
The 15D256 cap screw is installed in environments where secure fastening under pressure and vibration is required. According to parts lists from Graco hydraulic motor and pump kits, this screw is used in models such as the GH733, GH833, GH933, GH2570 and GH5040 series and other high‑volume sprayer/hydraulic systems. Given its application, it ensures that major assemblies remain properly clamped and aligned.
- Graco hydraulic motor/pump modules requiring socket head cap screws in mounting or housing brackets
- High‑pressure airless or texture sprayers where structural integrity is critical
- OEM maintenance kits where exact replacement fasteners maintain original machine reliability
Installation & Maintenance
- Use the correct sized hex key or Allen wrench to avoid rounding the socket head.
- Tighten to the manufacturer’s specified torque — under‑torque may loosen; over‑torque may thread‑strip or stress the assembly.
- Inspect during maintenance for signs of thread wear, head damage, or corrosion.
- Replace if the socket head is damaged or the material shows deformation — maintaining original OEM part ensures longevity and safety.
- Where vibration is present, consider a thread‑locker or lock‑washer if specified by the equipment manual.
Frequently Asked Questions
The socket head design allows for higher tensile strength and torque compared to standard screws, and provides a compact head profile which is ideal in tight mechanical assemblies.
While a generic fastener may fit physically, the OEM 15D256 is specified for material strength, threading, head profile and coating suited to Graco equipment. Using the correct OEM part ensures long‑term reliability.
Replace when you notice the socket head is rounded, the threads are damaged, or the screw shows signs of corrosion or loosening. Ensuring this fastener is in good condition is vital to system integrity.
