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Graco 100340 Nut

The Graco 100340 Nut is an OEM 3/8-16 hex nut used in various Graco ram, pump, and Therm-O-Flow assemblies. Designed for secure fastening and long-term durability.

  • Part Number: 100340
  • Thread Size: 3/8-16 UNC
  • Type: Hex Nut
  • Used In: Ram Supply Units, Hand Pumps, Therm-O-Flow 20 systems
  • OEM Brand: Graco

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About the Graco 100340 Nut (Hex 3/8-16)

Compatible Machines / Documented Applications

The 100340 Nut (hex, 3/8-16) is a standard OEM fastener used across multiple Graco assemblies. Verified appearances in Graco manuals include:

  • Ram Supply Units — e.g., Model 241083 (76 mm / 3 in Ram, 55:1 Bulldog/CM450)
  • Ram Supply Units — e.g., Model 241084 (76 mm / 3 in Ram, 20:1 King/DF2400)
  • Therm-O-Flow 20 systems — selected models list 100340 in hardware packs
  • Hand Pump / Lube Dispensers — lever/clevis hardware uses 100340

Product Summary

The Graco 100340 Nut is an OEM hex nut with 3/8-16 UNC threads. It secures brackets, rams, and pump sub-assemblies where Graco specifies 3/8-16 hardware, ensuring proper fit, strength, and serviceability compared with off-brand fasteners.

Specifications

OEM Brand Graco
Part Number 100340
Type Hex Nut
Thread Size 3/8-16 UNC
Typical Use General assembly hardware on rams, pumps, and material-handling modules
Interchange Use only the specified Graco OEM part to maintain design strength and fit

Key Benefits

  • OEM-correct fit: Matches Graco engineering drawings and torque specs.
  • Reliable fastening: Helps maintain alignment and clamp load under vibration.
  • Simplifies service: Direct replacement when your parts list calls out 100340.

Installation & Service Tips

  • Verify the callout (100340) on your machine’s exploded view before ordering.
  • Replace any damaged or rounded hardware; do not re-use distorted threads.
  • Torque to the spec in your equipment manual; re-check after initial run-in.

Frequently Asked Questions

It shares the 3/8-16 thread, but the OEM part ensures the correct grade, finish, and dimensions specified by Graco. For safety and durability, use the exact OEM callout where listed.

Commonly in ram frames, pump brackets, and hardware packs on systems like Therm-O-Flow 20 and certain Ram Supply Units. Always confirm location via your parts schematic.

Quantity varies by model and assembly. Check the “Parts List” page of your specific unit; some rams list multiple instances of 100340 in hardware groups.

Follow the torque values and locking methods in your machine’s service manual. Use threadlocker only where specified by Graco.

Order exactly what your schematic calls for. If your list does not show 100340, contact support with your model and serial to confirm the correct fastener.

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