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Graco 121797 Socket Head Cap Screw

A genuine Graco 121797 socket-head cap screw used for secure fastening in high-pressure sprayer assemblies. Ideal for OEM repairs where strength and reliability are critical.

  • High-strength steel OEM screw
  • Socket (Allen) cap head
  • Used in Graco plural-component & fluid-handling systems
  • Reliable torque retention for critical components

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Graco 121797 – Socket-Head Cap Screw

This is a genuine Graco OEM socket-head cap screw designed for secure, high-strength fastening in fluid- and structural assemblies. Ideal for use in critical high-pressure components where reliable torque retention is needed.

Compatible Machines

  • Graco XM Plural-Component sprayers
  • Graco Xtreme Mix systems
  • Graco Reactor spray-foam rigs

Technical Specifications

Part Number 121797
Head Style Socket (Allen) cap
Material High-strength steel (OEM)
Typical Use Fastening manifold plates, pump sections, or structural components

Benefits & Use Cases

  • Provides secure clamping to prevent loosening under vibration or pressure cycling
  • OEM-grade material ensures durability and proper torque retention
  • Allen head allows for compact installation in tight assemblies

Installation Guidelines

  1. Clean both mating surfaces before installing the screw.
  2. Lubricate or apply threadlocker if recommended by your parts manual.
  3. Hand-thread first, then tighten using an Allen key to the torque specification in your service manual.
  4. After running the system, re-check the torque to account for any settling.

Frequently Asked Questions

This screw is used to fasten critical components (such as manifolds or pump sections) where high-strength, vibration-resistant hardware is required.

Reuse depends on your torque-angle method and condition of the threads. If the screw was over-torqued or shows thread damage, replace it with a new OEM part.

Refer to your machine’s service manual for the specific torque spec. If unavailable, consult Graco’s OEM torque chart for socket-head cap screws.

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