Graco 111640 Internal Lock Washer

Graco 111640 Internal Lock Washer – Compatibility & Details

Compatible Machines

• Graco 235870 Series D Pump Assembly – ref. seat washer item in part list. :contentReference[oaicite:0]{index=0}
• Graco Heated Platens – Models in manual 313296 where part 111640 is used in electrical enclosure assemblies. :contentReference[oaicite:1]{index=1}
• Other Graco equipment specifying “Washer, Lock, Internal” with part number 111640 in their parts breakdown.

Product Overview

The Graco 111640 Internal Lock Washer is a genuine OEM fastener‑lock component designed to prevent loosening of bolts or screws under vibration or dynamic loads. Its internal‑tooth design ensures secure retention in critical assemblies.

Key Features

• Genuine Graco part for correct fit and specification
• Internal‑tooth design bites both fastener and mating surface to resist loosening
• Used in pump and electrical enclosure assemblies where locked fastening is required
• Easy to install during maintenance or refurbishment to ensure reliable assembly

Technical Specifications

Installation & Maintenance

To install the Graco 111640 Internal Lock Washer, position it under the screw or nut head with the internal teeth facing the mating surface. Ensure the fastener is tightened to the manufacturer‑specified torque to fully engage the lock washer. Inspect the washer during service intervals and replace if the teeth are flattened or the washer shows signs of deformation.

Frequently Asked Questions