Graco 15A726 Jam Nut

The Graco 15A726 Jam Nut is a durable locking nut designed to secure components in Graco hydraulic and piston pump assemblies, preventing loosening under pressure or vibration.

Heavy-duty metal construction for long-lasting reliability
Prevents threaded components from loosening in high-pressure systems
Easy to install and remove during maintenance
OEM Graco part for proper fit and performance

Retail Price: $38.3

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Description

Graco 15A726 Jam Nut

The Graco 15A726 Jam Nut is a precision locking nut used in Graco hydraulic and piston pump assemblies. It provides secure retention of critical components, helping prevent loosening caused by vibration or high pressure.

Key Features & Benefits

Heavy‑duty Metal Construction: Manufactured from robust metal to withstand the rigors of high-pressure systems.
Vibration Resistance: Locks securely against mating components, reducing the risk of loosening during operation.
OEM‑Grade Design: Genuine Graco part ensures a precise fit in compatible pump assemblies.
Serviceability: Designed for reliable installation and removal during regular maintenance or rebuilds.

Applications

Securing hydraulic and piston pump components in Graco sprayer systems.
Locking fittings and nuts in high-pressure assemblies to prevent loosening.
Used in maintenance and repair kits to restore pump integrity.

Installation & Maintenance Guidelines

Clean Threads: Ensure all mating threads are free of debris or old sealant to maintain a reliable lock.
Hand-Start Threading: Begin installation by hand to avoid cross-threading.
Torque Carefully: Tighten to the manufacturer's recommended torque to avoid over-stressing the nut.
Verify Lock: After tightening, check that the jam nut is properly seated against the component being secured.
Periodic Inspection: During routine maintenance, inspect the nut for signs of loosening or wear and re-tighten as necessary.

Technical Specifications

Part Number	15A726
Type	Jam Nut (locking nut)
Material	High-strength metal (steel or alloy)
Intended Use	Locking components in hydraulic/piston pump assemblies
Environment	High-pressure, vibration-prone hydraulic systems

Frequently Asked Questions

The jam nut securely locks threaded components in place, preventing them from loosening under vibration or pressure.

It is used in several Graco piston and hydraulic pump assemblies. For example, the LineLazer V 200HS parts list shows this nut as a component.

After hand-starting the thread, tighten to the torque value recommended by Graco in the service manual. Over- or under-tightening may compromise performance.