Graco 100186 Internal Tooth Lock Washer
The Graco 100186 Internal Tooth Lock Washer ensures a secure grip on vibration-prone assemblies. Commonly used across Graco sprayers and proportioners for reliable fastener retention.
- Part Number: 100186
- Type: Internal Tooth Lock Washer
- Typical Size: 5/16"
- Used In: GrindLazer™, Merkur®, Orion®, Predator™, Reactor® systems
- Function: Prevents loosening from vibration and movement
Compatible Machines & Assemblies
The Graco 100186 Internal Tooth Lock Washer appears across multiple Graco product families. Below are common assemblies/models where this washer is called out in Graco parts manuals. Always confirm with your machine’s specific parts list before ordering.
- GrindLazer™ Scarifiers — drum & cutter assemblies (Standard/various models).
- Merkur® Spray Packages — wall & cart mount package brackets and mounts (e.g., model ranges 233896–233910).
- Orion® Piston Pumps & Spray Packages — wall/cart mount packages (e.g., 234087, 234089, 234091, 234093) air/control brackets and mounts.
- Predator™ Proportioners — air control manifold/mounting sub-assemblies.
- Reactor® E-30i / E-XP2i (selected integrated proportioner assemblies and brackets).
Part Overview
The Graco 100186 Internal Tooth Lock Washer is a serrated inner-diameter lock washer designed to resist loosening from vibration. The internal “teeth” bite against the mating surface or fastener head, improving retention in high-vibration applications common to airless sprayers, proportioners, and surface-prep equipment.
| Attribute | Details |
|---|---|
| Graco Part # | 100186 |
| Type | Internal Tooth Lock Washer (serrated I.D.) |
| Typical Usage | Bracket mounts, air control panels, drum/cutter stacks, electrical/grounding fastener stacks, and other vibration-prone joints. |
| Typical Size Callout (example) | Appears as 5/16" I.D. in certain Graco package/manual callouts (verify your model’s diagram). |
| Interchange/Notes | Use only where your parts list specifies 100186; do not substitute external-tooth or split-lock types unless the manual permits. |
Installation & Good Practice
- Seat the washer so the teeth face the surface you want to grip (usually under a screw/bolt head or nut).
- Do not over-torque: tighten to the torque spec shown for the specific fastener in your manual.
- Replace if teeth are worn, flattened, or rusted; a fatigued washer loses bite and vibration resistance.
- Keep mating surfaces clean and dry to maximize bite and prevent fretting.
Frequently Asked Questions
No reviews yet. Be the first to review this product!
