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Graco 100068 Washer Lock Spring

Graco 100068 Washer, Lock, Spring is a genuine OEM hardware part designed to prevent bolts and screws from loosening due to vibration or pressure changes. Ideal for maintaining secure assemblies in Graco sprayers and accessories.

  • Part Number: 100068
  • Type: Lock-Spring Washer
  • Used In: RS Gun Cutter Assemblies, Low Level Shut-Off Kits
  • Function: Ensures vibration-resistant fastening
  • OEM Quality: Genuine Graco replacement part

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Compatible Machines & Assemblies

Verified from Graco parts lists and kit breakdowns. Always confirm with your exact model’s parts list.

  • RS Gun – Cutter Assembly (24E512 External Mix Gun, Series C & prior)
  • RS Gun – Cutter Assembly (24P681 Internal Mix Gun, Series A)
  • Low Level Shut-Off Kit (Model 918478)

What is Graco 100068 Washer, Lock, Spring?

The Graco 100068 is a genuine OEM Washer, Lock, Spring used to keep fasteners secure under vibration and repeated cycling. It provides spring tension that resists loosening, protecting your assemblies from shift or leak paths in high-duty applications.

Key Details (Quick Spec)

Part Number 100068
OEM Description Washer, Lock, Spring
Category Fastener hardware (locking washer)
Typical Use Securing screws/bolts on RS Gun Cutter assemblies and the Low Level Shut-Off Kit, among other Graco assemblies.
Fitment Guidance Match your machine’s exploded diagram/parts list for “100068 – Washer, lock, spring”. Use only where specified.
What’s Included Single lock-spring washer (quantity per your assembly’s parts list).

Fitment Notes

  • Because it’s a small OEM hardware item, 100068 appears across multiple Graco assemblies. Always verify the reference number and quantity in your exact model’s manual.
  • If your model lists “100068” in the breakdown, this is the correct lock-spring washer to use for that location.
  • Do not substitute generic washers unless the spec and performance match the OEM requirement.

Installation Best Practices

  • Clean mating surfaces; replace any damaged screws/bolts.
  • Install the Washer, Lock, Spring under the fastener head/nut as shown in your assembly diagram.
  • Tighten to the torque specified for your fastener size in the service manual.
  • Re-check fastener tightness after initial run-in (first job) if the manual recommends it.

Frequently Asked Questions

It adds spring tension beneath a fastener to resist loosening from vibration and thermal cycling—critical in sprayer guns, cutters, and accessory kits.

Check your model’s parts list. If the breakdown explicitly lists 100068 – Washer, lock, spring at the relevant reference number, it’s the correct part and quantity for that location.

Follow the OEM specification in your service manual. Hardware specs (ID/OD, thickness, spring profile) are determined by the fastener size and assembly requirements. Using off-spec hardware can compromise retention.

Reuse isn’t recommended if the washer shows flattening, cracks, or reduced spring action. Replace whenever the manual calls for new hardware or if retention is questionable.

Quantity varies by assembly. For example, some kits list multiple washers. Use the quantity specified in your model’s parts diagram for each fastener location.

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