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Graco 104541 Lock Nut

The Graco 104541 Lock Nut ensures secure and stable fitting for your spray equipment. Designed for durability and precision, it helps maintain tight assembly and leak-free performance.

  • Part Number: 104541
  • Material: High-strength metal
  • Application: Used for securing spray gun and pump components
  • Brand: Graco
  • Condition: New, genuine replacement part

$8.74
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Part Overview: Lock Nut Part 104541

The Lock Nut – part 104541 is an OEM locking fastener featuring a nylon insert, designed to maintain secure assemblies and resist vibration in Graco equipment.

Compatible Machines

  • Graco G-Mini / CSP Lubrication Kits (e.g., Kit 2000047 / 2004436) :contentReference[oaicite:1]{index=1}
  • Graco T1 / T2 / T3 Transfer Pump Series (lock nut used in pump mounting and tie rod assemblies) :contentReference[oaicite:2]{index=2}
  • Graco Hose Reels & Sprayer Systems (where part 104541 is specified) :contentReference[oaicite:3]{index=3}

Key Specifications & Features

Part Number 104541
Description Lock Nut with Nylon Insert (M8) :contentReference[oaicite:4]{index=4}
Material & Insert Metal nut with nylon locking insert – vibration-resistant locking design
Main Use Secures assemblies in high-vibration spray and fluid-handling systems
Typical Applications Spray foam rigs, hose reels, transfer pumps, lubrication kits

Why This Lock Nut Matters

  • Vibration-resistant security: Nylon insert helps prevent loosening under dynamic loads.
  • OEM fit & reliability: Matches Graco’s specified part, ensuring correct fit and performance.
  • Easy to install: Standard M8 size and reused in many assemblies reduces downtime.

Installation & Maintenance Tips

Follow these practices to ensure long service life and safe operation:

  1. Ensure system is depressurized and safe to work on before loosening any nut.
  2. Inspect threads and mating surfaces for wear, debris or damage before installing new nut.
  3. Hand-tighten then torque to the equipment’s specification; avoid over-tightening the nylon insert nut.
  4. During routine service, check for signs of loosening or movement; replace the nut if the nylon insert is worn or the fit is loose.

Frequently Asked Questions

Yes — the part description lists it as a “Lock Nut with Nylon Insert, M8 – (SKU: 104541)” and identifies it as a Graco OEM component. :contentReference[oaicite:5]{index=5}

While the size (M8) and function may match other equipment, its primary design and specification are for Graco assemblies. Use in non-Graco equipment should only be done after verifying fit, thread type and load requirements.

Inspect the lock nut during normal maintenance intervals. If the nylon insert shows wear or the nut loosens under vibration, replace immediately to maintain safe and reliable operation.

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