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Graco 103656 Hex Pipe Fitting

Genuine Graco 103656 Hex Pipe Fitting (hex nipple) for fluid connections on specified Graco equipment. Compact, wrench-ready hex body; use compatible sealant and confirm thread size in your manual.

  • Thread: 1/8″ NPT male (verify per machine)
  • Fits: GX-7 / GX-7 DI, S100, U100 (where listed)
  • Use: Straight male-to-male pipe connection on fluid blocks/plates

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Compatibility & Highlights for Graco 103656

Compatible Machines

  • Graco GX-7 / GX-7 DI Spray Guns
  • Graco S100 Series Proportioners
  • Graco U100 Series Proportioners
  • Other Graco equipment that specifies this fitting in the parts diagram (verify thread and location before ordering)

Product Overview

The Graco 103656 is a genuine Hex Pipe Fitting (hex nipple) used in fluid circuits on select Graco spray guns and proportioners. Its hex body allows easy wrenching in tight spaces, providing a reliable male-thread connection where specified in Graco assemblies.

Key Specifications

Part Number 103656
Common Name Fitting, Pipe, Hex (Hex Nipple)
Typical Thread 1/8″ NPT male (confirm against your machine’s parts manual)
Typical Use Joins fluid components/blocks where a straight male NPT connection is specified
Installation Apply compatible pipe sealant/tape to male threads; tighten with a wrench on the hex flats—avoid over-torque

Fitment Notes

  • Use only where the machine’s parts list explicitly calls out 103656.
  • For GX-7 / GX-7 DI guns and S100 / U100 series, location is typically on fluid blocks/plates as shown in their manuals.
  • Always match thread size, sealant compatibility, and pressure rating to your material and equipment.

Frequently Asked Questions

It’s a straight Hex Pipe Fitting (hex nipple) providing a male-thread connection—commonly used to join fluid passages on Graco equipment where specified.

It appears on select Graco GX-7 / GX-7 DI spray guns and S100 / U100 proportioners, and may be used on other units where the parts list calls it out. Always confirm against the specific machine manual before ordering.

Use a sealant or tape compatible with NPT threads and the fluid being sprayed (solvent, foam, adhesive, etc.). Follow Graco manual guidance and your material supplier’s recommendations.

No. This is a straight hex nipple (male-to-male). Unions and swivels are different components used for quick disconnects or rotational freedom.

Clean threads, apply compatible sealant/tape, hand-tighten until snug, then tighten further with a wrench on the hex—do not over-torque. Re-check for leaks under operating pressure.

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