Graco 100322 Washer Lock

Graco 100322 Washer Lock is a genuine OEM lock washer designed to prevent fastener loosening under vibration and pressure. Ideal for use in Graco regulators and ram supply units.

Part Number: 100322
Type: External Shake-Proof Lock Washer
Size: 7/16″ (for Regulator Model 206661)
Used In: Regulators, Ram Supply Units, Retrofit Kits
OEM Quality: Genuine Graco hardware for perfect fit

$8.77

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Description

Graco 100322 Washer Lock – Overview

Compatible Machines / Assemblies

Use the Graco 100322 Washer Lock wherever the parts manual explicitly calls out 100322. Confirm against your unit’s schematic before ordering.

High-Pressure Fluid Regulator — Model 206661 (uses 100322 as an external shake-proof; 7/16″ lock washer in the regulator assembly).
Ram Supply Unit Assemblies (several configurations list 100322 WASHER, lock within the supply unit/ram module parts breakdown).
Mark V / Ultra 1500 Pressure Control Retrofit Kit (308723) — kit bill of materials includes 100322 LOCK WASHER for the retrofit assembly.

Key Specs

Part Number	100322
Type	Washer, Lock (external tooth / shake-proof)
Nominal Size (example use)	7/16″ (as specified for Regulator Model 206661)
Typical Locations	Regulators, ram/supply unit frames, hardware interfaces where anti-loosening is required
Genuine OEM	Use genuine Graco hardware for proper fit and retention

Why choose the 100322 Washer Lock?

Vibration-resistant retention to help prevent fastener loosening in high-pressure sprayer systems.
OEM-specified in multiple Graco regulator and ram/supply unit schematics.
Drop-in replacement wherever the bill of materials lists 100322.

Fitment & Ordering Notes

Always verify against your exact model’s parts list or exploded diagram before purchase.
Some assemblies specify quantity (e.g., “Qty: 2”) — check the schematic to determine how many you need.
If your unit’s manual lists a different lock-washer size (e.g., 3/8″) under a different part number, order that exact number instead.

Frequently Asked Questions

It may, but only if the Magnum model’s parts breakdown explicitly lists 100322. Check your sprayer’s manual; if a different lock-washer part number is shown, use that exact number.

For the High-Pressure Fluid Regulator Model 206661, the manual calls out an external shake-proof; 7/16″ lock washer under part number 100322. Other assemblies may specify different sizes under different part numbers.

No. Graco uses multiple lock-washer part numbers (e.g., different sizes/specs). Only use 100322 where specified.

Quantity varies by assembly. For some Ram Supply Unit configurations and regulator sub-assemblies the BOM shows a quantity of 2. Always confirm in your model’s parts list.

Refer to your sprayer or module’s Graco manual (regulator, ram/supply unit, retrofit kit, etc.). Locate the Repair-Parts section and verify the washer entry shows 100322.