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Graco 100056 Hex Jam Nut

Graco 100056 NUT, JAM, HEX is a genuine locking nut designed to secure hardware in Graco sprayer assemblies. Ideal for maintaining tight, vibration-resistant connections.

  • Part Number: 100056
  • Type: Hex Jam Nut
  • Used In: FieldLazer, TurfLiner, and 8900 Proportioner
  • Purpose: Prevents loosening of components under vibration
  • Quality: OEM Graco Replacement Part

$10

Product has been Discontinued by Manufacturer

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Graco 100056 – NUT, JAM, HEX

Compatible Machines

  • Graco FieldLazer (Model 248942) – used in the spray shield kit (qty 2)
  • Graco TurfLiner (TurfLiner line striper) – used in the spray shield kit (qty 2)
  • Graco 8900 Proportioner – used in the Boom Assembly (qty 1)

What is the Graco 100056?

The Graco 100056 NUT, JAM, HEX is a low-profile hex jam nut used to lock components in place on threaded shafts or studs within Graco assemblies (e.g., spray shield kits and boom hardware). Jam nuts are typically tightened against a mating nut or component to resist loosening from vibration.

Quick Facts

Part Number 100056
Common Name NUT, JAM, HEX
Function Locks/retains adjacent hardware to prevent loosening from vibration and use.
Where Found Spray shield assemblies (line stripers) and boom assemblies (proportioner systems).
Thread/Material Not explicitly published in the cited manuals; verify against your model’s parts list before purchase.

Installer Notes

  • Match the assembly reference in your manual to ensure the correct quantity and location.
  • When used as a jam pair, hold the component nut while tightening the jam nut against it.
  • Do not over-torque; follow the torque guidance in your machine’s service documentation.
  • Use only genuine Graco hardware to maintain fit and safety.

Frequently Asked Questions

A jam nut is a thin hex nut that’s tightened against another nut or component to lock the adjustment and resist loosening from vibration. In these Graco assemblies it keeps guides, shields, or boom hardware fixed in position during operation.

Check your model’s Instruction/Parts manual and look for “100056 NUT, JAM, HEX” in the relevant assembly diagram (e.g., spray shield kit or boom assembly). Match the reference number and quantity listed for your serial range.

The cited manuals list the part as a jam hex nut but do not publish the thread spec or material. Refer to your machine’s parts list or contact support with your model and serial to confirm exact specifications before ordering.

Torque values can vary by assembly. Use the torque guidance in your model’s service section; if unspecified, tighten only enough to lock the mating component without deforming threads or brackets.

For best fit and safety, use genuine Graco parts. If substitution is unavoidable, the replacement must match thread, material grade, and thickness profile; verify clearances in the specific assembly.

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