Graco 117791 Tri Lobe Cap Screw

Graco 117791 Tri Lobe Cap Screw provides secure, leak-free fastening for Graco airless and texture sprayers, ensuring stable pump alignment and reliable performance.

OEM-grade stainless steel construction
Tri-lobe design for precise torque control
Resists corrosion and high-pressure wear
Ensures consistent pump performance

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Description

Graco 117791 Tri Lobe Cap Screw – Precision Fastening for Airless Pump Systems

Compatible Machines

Graco RTX 650 Series
Graco RTX 5000PX and RTX 2000PI
Graco Mark V and Mark VII Texture Sprayers

Product Overview

Graco 117791 Tri Lobe Cap Screw is an OEM-grade fastener engineered for airless sprayer pump assemblies. Designed with tri-lobe precision, it ensures stable, leak-free operation under high-pressure conditions while maintaining exact alignment between rotor and stator components.

Key Features

Manufactured from 17-4 PH stainless steel for corrosion resistance
Tri-lobe geometry for consistent torque distribution
Compact dimensions for easy installation
OEM-quality fit and high-pressure durability
Rated for up to 5,000 psi performance

Technical Specifications

Specification	Details
Part Number	117791
Material	17-4 PH Stainless Steel
Dimensions	1" (H) × 0.75" (L) × 0.75" (W)
Torque Capacity	Up to 60 in·lb
Pressure Rating	Up to 5,000 psi
Finish	Electropolished and Passivated

Benefits

Prevents fluid leaks and thread wear
Ensures precision rotor-stator alignment
Improves overall pump efficiency and seal longevity
Easy maintenance and long service life

Frequently Asked Questions

It secures critical pump components in Graco airless and texture sprayers, maintaining proper alignment and preventing fluid leaks under pressure.

Replacement is recommended every 3,000 operational hours or when visible thread wear or corrosion is observed during routine maintenance.

While it is designed for Graco RTX and Mark series units, it may fit similar sprayer models that use equivalent tri-lobe threaded fasteners, but OEM use is recommended for best results.