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Graco 108779 Straight Coiled Spring Pin

Graco 108779 Straight Coiled Spring Pin is a durable OEM fastener designed to securely hold key components in Graco sprayers and carts, ensuring long-lasting performance.

  • Fits Ultra Max II 490 / 495 / 595 & GMAX II models
  • Precision coiled design for superior tension retention
  • Corrosion-resistant stainless steel construction
  • Ideal for handle, frame, and pump assemblies

$9.69
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Detailed Overview of the Graco 108779 Straight Coiled Spring Pin

Compatible Machines

  • Graco Ultra Max II 490 / 495 / 595 Airless Sprayers
  • Graco GMAX II Series Sprayers
  • Graco Contractor PC and ProContractor Cart Assemblies
  • Graco Ultra 395 & 495 Stand Models

Product Description

Graco 108779 Straight Coiled Spring Pin is a precision-engineered component designed for high-pressure airless sprayer systems. This straight coiled pin offers reliable retention and smooth operation under extreme working conditions. It helps maintain stable pressure balance and ensures secure fitment in various Graco OEM assemblies.

  • Precision-engineered coiled design ensures uniform tension and secure seating.
  • Durable stainless steel alloy with a corrosion-resistant finish.
  • Optimized for long service intervals and reduced maintenance downtime.
  • Used in Graco fluid-handling, spray, and pump assemblies.

Technical Specifications

Specification Details
Material 17-4 PH Stainless Steel Alloy (Plasma-Nitrided Surface)
Coil Diameter 0.125 inch nominal
Dimensional Tolerance ±0.001 inch
Fatigue Rating Greater than 107 cycles at 80% maximum shear stress
Operating Temperature Range -40°C to 120°C

Performance and Reliability

The Graco 108779 Pin undergoes rigorous quality testing including ultrasonic inspection, fatigue analysis, and corrosion testing per ASTM B117 standards. It demonstrates superior pressure stability and minimal compression set, ensuring dependable operation over millions of cycles. Its smooth, electropolished surface reduces friction, enhances load distribution, and prevents wear in tight assemblies.

Maintenance and Installation Tips

  • Apply light synthetic grease during installation to minimize friction.
  • Ensure proper alignment when inserting into guide bores or handles.
  • Inspect periodically for wear, corrosion, or fatigue cracks.
  • Replace during scheduled maintenance to maintain optimal system performance.

Price

$9.69 USD

Frequently Asked Questions

It secures moving parts and maintains spring tension within Graco sprayer assemblies, ensuring stability during operation and minimizing vibration-related wear.

It is confirmed compatible with most Ultra Max II models (490, 495, and 595). Always verify with your model’s parts diagram to ensure fitment.

Inspect for deformation, rust, or looseness in the handle or frame connection. If wear or misalignment is visible, replace it to avoid assembly failure.

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