Graco 101566 Lock Nut

The Graco 101566 Lock Nut is an OEM fastening component designed to secure critical assemblies in high-vibration environments, ensuring long-lasting reliability.

OEM Part #: 101566
Replaces: 17W095
Used On: LineLazer V 3900 & 5900, ProMelt 24H624/24H626, GrindLazer units
Function: Prevents loosening and secures vibration-prone joints

$13.1

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Description

Graco 101566 Lock Nut

Compatible Machines

The Graco 101566 Lock Nut is used in various line stripers, thermoplastic melters, and surface preparation units. Below are the confirmed compatible models:

Graco LineLazer V 3900 Standard Series – 1-Gun (17H449)
Graco LineLazer V 3900 Standard Series – 2-Gun (17H450)
Graco LineLazer IV 3900 Airless Line Striper
Graco LineLazer IV 5900 Airless Line Striper
Graco ProMelt Thermoplastic Units – Models 24H624 & 24H626
Graco GrindLazer Surface Prep Equipment (various models)

If your sprayer or line striper isn’t listed, check your parts manual or contact support to confirm compatibility.

Product Overview

The Graco 101566 Lock Nut is a genuine OEM fastening part designed to hold critical assemblies securely in place. It prevents loosening due to vibration and ensures reliable operation in heavy-duty Graco equipment, including LineLazer, ProMelt, and GrindLazer systems.

Key Specifications

OEM Part Number	101566
Part Type	Lock Nut (OEM)
Replaces / Cross Reference	17W095
Used In	Line Stripers, Thermoplastic Melters (ProMelt), Surface Prep Units (GrindLazer)

Frequently Asked Questions

Yes, it is also found on several LineLazer IV series, ProMelt units, and some GrindLazer models. Always check your parts manual for exact placement before ordering.

Yes, it is a genuine OEM Graco part that meets factory standards for durability and fit on all compatible equipment.

The 101566 Lock Nut replaces Graco part number 17W095 and can be used interchangeably where specified.