Graco 116424 Cap Nut

The Graco 116424 Cap Nut is an OEM cap‑style nut used to securely fasten valves or housings in fluid‑handling and spray systems — designed to ensure a tight, leak‑resistant seal and maintain system integrity under pressure.

Cap‑nut for drain valve, filter housing or fluid‑system components
OEM‑grade for proper fit and durability in Graco equipment
Ensures leak‑free sealing and stable fastening under pressure
Used on sprayers, line‑marking machines, or fluid dispensers where Nut, Cap (116424) is specified

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Description

Graco 116424 – Cap Nut

Overview
The Graco 116424 Cap Nut is a genuine OEM cap‑style nut used in Graco fluid‑handling, paint‑sprayer, and line‑marking equipment. It ensures secure, leak‑resistant fastening of drain valves, housings, filters or other fluid‑system components — helping maintain system integrity under pressure and use. ([authorized parts listings])

Key Features & Specifications

Original Graco part number: 116424 — genuine OEM cap nut. :contentReference[oaicite:5]{index=5}
Designed to provide tight, reliable sealing and fastening in fluid‑handling assemblies — especially drain valves or filter housings. :contentReference[oaicite:6]{index=6}
Constructed to withstand pressure, corrosion, and repeated use typical in industrial sprayers or coating equipment. :contentReference[oaicite:7]{index=7}

Compatible Machines / Assemblies

No publicly available complete list mapping 116424 to every Graco model.

Known usage includes drain‑valve assemblies, filter housing, or fluid outlet components on various airless sprayers, line‑marking machines and coating systems that call out “Nut, cap (116424)” in their parts diagrams. :contentReference[oaicite:8]{index=8}

To confirm fitment for your machine: open its parts breakdown manual and check if 116424 is referenced for the part you’re replacing — if yes, then 116424 is the correct cap nut.

Why Use This Cap Nut?

You should use this nut when you need to:

Secure drain valves, filter housings, or fluid‑system components reliably
Replace worn, damaged or missing nuts to prevent leaks or component loosening
Use genuine OEM‑grade parts for proper fit, pressure resistance, and long service life
Maintain system integrity and safety under high pressure or repeated use

Frequently Asked Questions

A cap nut is tightened onto a threaded housing (e.g. drain valve or filter housing) to seal and secure internal components — preventing leaks and ensuring stable fluid flow under pressure.

Yes — 116424 is listed in official Graco spare‑parts catalogs as “NUT, CAP” and appears in parts diagrams for drain‑valve or fluid‑system assemblies. :contentReference[oaicite:9]{index=9}

Replace the nut if it's worn, stripped, corroded, or no longer provides a proper seal — because a damaged cap nut can lead to leaks, loss of pressure, or unsafe operation of the fluid system.