The Graco 103739 Washer Lock INT is a durable internal tooth lock washer designed to keep fasteners secure in high-vibration equipment.
The Graco 103739 Washer Lock INT is a precision-engineered fastening component designed to prevent loosening in high-vibration environments. This internal tooth lock washer is commonly used in Graco airless paint sprayers and related equipment where secure fastening is critical.
| Part Number | 103739 |
| Type | Internal Tooth Lock Washer |
| Material | Carbon Steel (Plated) |
| Fastener Size | #4 |
| Function | Prevents loosening caused by vibration |
The internal lock washer features inward-facing teeth that bite into the fastener head and the mounting surface. This design ensures a firm grip, helping maintain tight connections even under constant vibration or movement.
Commonly used across Graco sprayers and industrial assemblies, this washer plays a vital role in maintaining equipment reliability and reducing maintenance caused by loose fasteners.
