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Graco 100272 Washer Lock Internal Tooth

The Graco 100272 Washer, Lock, Internal Tooth ensures fastener stability under vibration for dependable sprayer performance. Ideal for maintaining tight connections in paint sprayers and pump assemblies.

  • Part Number: 100272
  • Type: Internal-Tooth Lock Washer
  • Purpose: Prevents loosening of screws and bolts
  • Used In: Multiple Graco sprayer assemblies

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Graco 100272 — Washer, Lock, Internal Tooth (Product Content)

Compatible Machines

What is Graco 100272 Washer, Lock, Internal Tooth?

The Graco 100272 is an internal-tooth lock washer used to help prevent fasteners from loosening due to vibration and cyclic loading. The internal teeth bite into the underside of the fastener head or nut and the mating surface, improving retention in high-vibration environments commonly found in paint sprayers and fluid-handling equipment.

Quick Specs

Part Number 100272
Part Name Washer, Lock, Internal Tooth
Function Prevents fastener loosening under vibration by biting into surfaces.
Typical Use General hardware within Graco assemblies (fastener retention points in sprayers, pumps, frames, brackets).
Fitment Guidance Match by part number in your unit’s parts diagram before purchase.

How to Confirm Fit

  1. Locate your sprayer’s exact model and series (e.g., Ultra/Ultra Max II, Magnum ProX, Mark Series, GMAX II, etc.).
  2. Open the official parts diagram for your model.
  3. Verify that 100272 is listed at the specific hardware location you’re servicing.
  4. Match quantity and adjacent fasteners to ensure correct assembly.

Compatibility Notes

  • This is a small hardware item used in multiple assemblies; compatibility is model- and subassembly-specific.
  • If your diagram shows a different washer type (e.g., external-tooth, split lock), do not substitute.
  • When servicing, inspect the mating surfaces; replace any worn washers in sets for consistent clamping.

Frequently Asked Questions

Functionally similar, but for service accuracy you should use the exact Graco 100272 part number listed in your parts diagram to ensure the correct size/spec and consistent hardware stack-up.

It can appear under screw or bolt heads in brackets, frames, guards, or control panels—where vibration resistance is required. Check your model’s parts diagram for its exact position.

Reuse is not recommended if the teeth are flattened, corroded, or if the washer has lost spring tension. Replace during service to maintain proper fastener retention.

Yes. Ensure the washer sits flat and concentric with the fastener. The internal teeth should engage the underside of the fastener head or nut and the mating surface when tightened to spec.

Match the part number 100272 in your model-specific parts list or diagram. Cross-check nearby hardware (screw/bolt size and stack-up) before ordering.

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