Graco 116563 Nut Push-On Retainer

Graco 116563 – Push‑On Retainer Nut

The Graco 116563 Push‑On Retainer Nut is an OEM‑grade retention component designed to secure internal shafts or studs in compatible Graco pump and fluid systems. It uses a push‑on design — meaning no threading — to lock components in place and prevent axial movement under vibration or pressure.

Key Features & Purpose

• Push‑on style nut: slides onto a shaft or stud, locking components firmly without standard threading. :contentReference[oaicite:6]{index=6}
• OEM quality: genuine Graco part — ensures correct size and secure retention as per original design. :contentReference[oaicite:7]{index=7}
• Compact & simple: small hardware — quick to install or replace during maintenance or rebuilds. :contentReference[oaicite:8]{index=8}
• Used in pump / chemical‑injector assemblies: part of the internal retention hardware used to hold internal pump/manifold components in place. :contentReference[oaicite:9]{index=9}

Compatible Systems / Applications

• Graco hydraulic pumps or fluid‑handling systems listing 116563 as the “nut, push on” in their internal parts diagram. :contentReference[oaicite:10]{index=10}
• C hemical‑injector pump assemblies and other fluid‑handling units where internal shafts or studs require a push‑on retainer nut for secure assembly. :contentReference[oaicite:11]{index=11}
• Maintenance or repair applications — when disassembling and re‑assembling internal pump/manifold components and you need a proper OEM retainer nut for secure retention. :contentReference[oaicite:12]{index=12}

Note: Because 116563 is a hardware retention part, compatibility depends strictly on whether your machine’s original design or parts list calls for a push‑on retainer nut. Check your pump or system’s parts diagram before ordering or installing. :contentReference[oaicite:13]{index=13}

When & Why to Use / Replace It

• If the original retainer nut is missing, damaged, or lost — replacing with 116563 restores correct component retention and safety.
• During maintenance, repair or rebuild of internal fluid‑handling or pump assemblies — ensures parts remain securely fastened under operation.
• To maintain operational integrity under vibration or pressure — the push‑on nut prevents axial movement or loosening of internal parts likely to shift under load.

Frequently Asked Questions