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Graco 100128 Washer Lock

The Graco 100128 Washer, Lock (5/8") is a genuine OEM part designed to secure bolts and prevent loosening under vibration. Commonly used in various Graco assemblies and systems.

  • Part Number: 100128
  • Type: Lock Washer, 5/8"
  • Used In: Supply Systems, Gear Meter, Hydra-Cat, Extruder Units
  • Purpose: Maintains joint tightness and assembly integrity

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Overview: Graco 100128 Washer Lock (5/8")

Compatible Machines / Systems

The Graco 100128 Washer Lock (5/8") is a standard OEM component used in various Graco industrial and airless spray systems. Please confirm compatibility with your equipment manual before ordering.

  • General Industry Supply Systems – used in tie-rod and platen assemblies.
  • 1:1 Extruder Systems (Check-Mate® / Ram) – appears in multiple parts lists.
  • Gear Meter Systems – listed in gear-pump frame assemblies.
  • Hydra-Cat® Proportioners – used for vibration-resistant fastening.
  • Fluid Automation F4 Series – included in mix-dispense frame hardware.

Product Details

Part Number 100128
Official Name Washer, Lock (5/8")
Function Prevents loosening of nuts and bolts under vibration or stress loads.
Common Use Typically paired with Graco 100127 Nut (5/8-11) in tie-rod or frame assemblies.
Category Fasteners / Hardware Components

Why Choose Genuine OEM

  • Designed to meet Graco factory specifications for size and tolerance.
  • Ensures reliable performance and proper torque retention under vibration.
  • Easy cross-reference using the original Graco part number 100128.

Frequently Asked Questions

While dimensionally similar, the Graco 100128 Washer Lock is the OEM-specified version used in Graco assemblies. Using the genuine part ensures proper fit and reliability.

It appears in manuals for General Industry Supply Systems, 1:1 Extruder Units, Gear Meter Systems, Hydra-Cat Proportioners, and Fluid Automation F4 Series.

This washer lock is designed for a 5/8-inch bolt or nut interface, as referenced in multiple Graco manuals.

Check the exploded parts diagram for your model. If 100128 is listed alongside 100127 Nut (5/8-11), it’s the correct lock washer for your assembly.

The Graco 100128 Washer Lock is manufactured from durable, high-grade steel for strength and vibration resistance in industrial environments.

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