Graco 100521 Screw Cap Hex Hd
$10.70
In Stock
The Graco 100521 Screw Cap Hex HD is a genuine OEM fastener designed for reliable performance in various Graco assemblies. Perfect for securing pump frames, manifolds, and other structural components.
- Thread: 5/16-18 UNC (coarse)
- Length: approx. 7/8 inch
- Head Type: Hex Head Cap Screw (Heavy Duty)
- Fits: RoadPak, RoadLazer, LineLazer IV 250DC, and other compatible Graco units
- OEM Quality: Genuine Graco replacement part
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
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OEM Hex-Head Fastener for Graco Assemblies — 100521
Compatibility
Compatible Machines
The Graco 100521 Screw Cap Hex HD appears in multiple Graco parts lists. Confirm your parts manual before ordering.
- Graco RoadPak / RoadLazer Series — e.g., models 24G624, 24G625 where 100521 is specified in the manual.
- Graco LineLazer IV 250DC — self-propelled line striper models listing 100521 as “screw, cap hex hd.”
- Other Graco pumps & proportioners — any unit that specifies 100521 in its official parts list (common where 5/16-18 UNC bolts are used).
The Graco 100521 Screw, Cap Hex Head (HD) is a factory-spec fastener used across various Graco assemblies. Its hex head design and 5/16-18 UNC threading provide dependable clamping for pump frames, manifolds, and component clusters where OEM hardware is required.
Key Features
- OEM accuracy — correct thread class and head profile for Graco equipment.
- Durable fastening — supports repeat torque cycles in service/maintenance.
- Service-friendly — standard hex head for easy access with common tools.
Specifications
| Part Number | 100521 |
|---|---|
| Description | Screw, Cap Hex HD (Hex-head cap screw) |
| Thread | 5/16-18 UNC (coarse) |
| Typical Length | Commonly referenced near 7/8 in. in some listings (verify in your manual) |
| Use Case | Fastening of pump frames, manifolds, and component clusters on Graco equipment |
| Origin | Genuine Graco replacement part |
What’s Included
- 1 × Graco 100521 Screw, Cap Hex Head (HD)
Installation & Fit Notes
- Use correct torque; overtightening can damage threads or clamp surfaces.
- Replace worn or stretched fasteners during maintenance.
- Verify thread engagement and washer usage as shown in your model’s manual.
Frequently Asked Questions
| Question | Answer |
|---|---|
| Is 100521 universal across all Graco sprayers? | No. It is used on many models, but you must confirm your exact model’s parts list before ordering. |
| What thread does it use? | 5/16-18 UNC (coarse). Confirm the required length for your assembly. |
| Can I substitute a hardware-store bolt? | Using non-OEM hardware risks mismatched thread class, material, or head profile. For safety and reliability, use the OEM Graco 100521. |
| Where can I find confirmation it fits my unit? | Check your unit’s official Graco parts manual and verify that 100521 is listed for your model. |
| Do I need threadlocker? | Only if specified by your manual. Many assemblies rely on proper torque and washers; follow the manufacturer’s guidance. |
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