Graco 866274 Plug 3/4-20

Quick Look – Graco 866274 Plug (3/4‑20)

The Graco 866274 Plug, 3/4‑20 is a genuine OEM threaded plug designed to seal 3/4‑20 ports in Graco fluid and pump systems, providing reliable closure and preventing leaks under pressure.

Compatible Machines

This 3/4‑20 plug is referenced in OEM parts diagrams of Graco piston pumps and related fluid systems that use a 3/4‑20 threaded port:

• Graco Heavy‑Duty Airless Sprayer Pump Assemblies — plugs unused fluid or valve ports in internal pump assemblies. :contentReference[oaicite:1]{index=1}
• Graco Pressure Pump Units — used in industrial fluid transfer pumps with 3/4‑20 threaded service ports. :contentReference[oaicite:2]{index=2}
• Graco Cart & Stationary Sprayer Pumps with threaded plug locations on valve manifolds requiring 3/4‑20 closure. :contentReference[oaicite:3]{index=3}

Specifications & Details

Frequently Asked Questions