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Graco 102063 Washer Lock Ext

The Graco 102063 Washer, Lock, Ext is a durable external lock washer designed to prevent loosening of bolts and nuts in Graco spray equipment exposed to vibration and pressure.

  • Part Number: 102063
  • Type: External Lock Washer
  • Used In: XM Series, F4 Series, ProContractor & ProComp models
  • Purpose: Secures fasteners and ensures reliable assembly

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Compatibility & Technical Summary

Compatible Machines

  • Graco XM Plural-Component OEM Sprayers (selected models; see model parts lists)
  • Graco F4 Series Fluid Automation – Base/Ram assemblies (selected configurations)
  • Graco ProContractor / ProComp airless sprayers where this lock washer is specified in the fastener stack

Product Overview

The Graco 102063 Washer, Lock, Ext is an external lock washer used under a bolt head or nut to resist loosening from vibration and torque. It’s specified by Graco across various assemblies in plural-component systems, fluid automation bases, and professional airless sprayers.

Technical Specifications

Graco Part Number 102063
Official Name Washer, Lock, Ext (External Lock Washer)
Function Prevents fastener loosening in high-vibration/pressure assemblies
Typical Applications Plural-component sprayers (XM), fluid automation bases (F4), and select ProContractor/ProComp sprayers
Approx. Weight ~0.005 lb (reference value)
Usage Note Use as specified in the model’s parts diagram; torque the mating fastener to spec

Installation & Notes

  • Place the lock washer between the fastener head (or nut) and the mating surface.
  • Follow the torque specification in your model’s service manual.
  • For best results, replace worn or deformed lock washers during service.
  • Use genuine Graco parts to maintain performance and safety.

Frequently Asked Questions

It may. This is a commonly specified lock washer across several Graco platforms (e.g., XM, F4, select ProContractor/ProComp). Confirm by checking your model’s parts manual for part 102063.

It denotes an external lock washer that resists loosening from vibration by biting into the mating surface under a bolt head or nut.

Use the specified Graco 102063 where called out. Generic substitutes may differ in material, hardness, or thickness and may not meet Graco’s assembly requirements.

Torque specifications are provided in your machine’s service/parts manual for the specific fastener and assembly in which 102063 is used.

Inspect during disassembly; replace if flattened, cracked, or corroded. Always reinstall a proper lock washer when re-torquing the assembly.

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