Graco 104587 Screw, Thumb – Secure Fastening Component
Compatible Machines
- Graco Model 215955 (200 L / 55 gal, Stainless Steel, Polyethylene Packed)
- Graco Model 215958 (Stubby Size, Stainless Steel, Polyethylene Packed)
- Graco Model 237253 (200 L / 55 gal, Stainless Steel, PTFE Packed)
- Graco Model 237256 (Stubby Size, Stainless Steel, PTFE Packed)
- Graco Model 220440 (200 L / 55 gal, Stainless Steel, Rubber Packed)
- Graco Model 220439 (Stubby Size, Stainless Steel, Rubber Packed)
- Graco Model 237254 (Stubby Size, Carbon Steel, Leather Packed)
Graco Model 237255 (Stubby Size, Carbon Steel, PTFE Packed)
Product Description
The Graco 104587 Screw, Thumb is a convenient hand-operated fastening component designed for secure mounting and easy access in Graco equipment assemblies. Its thumb-style head enables manual tightening without tools, ideal for maintenance-friendly and service-accessible installations.
Key Features
- Thumb-style head for tool-free tightening and loosening
- Designed for frequent maintenance access in industrial spray systems
- Compatible with multiple Graco displacement pump models and assemblies
- Durable construction suitable for repeat service cycles
- Helps maintain secure connections while enabling swift component removal
Technical Specifications
| Specification |
Details |
| Part Number |
104587 |
| Component Type |
Screw, Thumb (hand-tightened fastening screw) |
| Thread & Size |
M8 × 1.25 (typical for mounting plate) – see assembly drawing |
| Material |
Durable metal alloy (service environment rated) |
| Function |
Secures assemblies, panels or accessories, allows easy removal |
| Intended Usage |
Hand-serviceable fastening in Graco equipment |
Applications
This screw is used in professional fluid-handling and spray systems such as Graco’s displacement pumps, mounting drums, cabinets or covers where frequent access is required. It enables rapid access for cleaning, maintenance, or replacement of core components without needing tools or specialized fasteners.
Performance Advantages
- Reduces downtime by enabling quick access to panels and modules
- Limits need for tools or specialist hardware during servicing
- Maintains secure mechanical connection under vibration and high-use conditions
- Improves serviceability of pump and spray system assemblies
- Helps ensure proper alignment and fastening without over-torque risk
Maintenance Tips
When servicing equipment, inspect the thumb screw for signs of thread wear or deformation. Ensure the mating surface is clean and the threads engage fully. Tighten by hand until snug, without over-torquing. Replace the screw if the head becomes stripped, the thumb-knob loosens, or the threads exhibit damage, to maintain secure fastening and safe service access.
Frequently Asked Questions
It serves as a hand-tightened fastening screw (thumb head) to secure components, covers or assemblies, enabling tool-free removal and servicing.
It fits on a variety of Graco displacement pump models and other equipment assemblies requiring a thumb screw: see the “Compatible Machines” list above.
Ensure the mating threads are clean and undamaged. Insert the thumb screw by hand and tighten until snug; avoid using tools to over-torque the thumb head. Verify that the component is secure but service-accessible.
Replace the screw if the thumb-head becomes damaged, stripped, or fails to engage properly, or if the fastening no longer maintains a secure connection under service conditions.
