Graco 120088 Hex Head Screw 3/8-16 x 4

Graco 120088 Hex Screw Overview

Compatible Machines

• Graco Ultra Max II 695
• Graco Ultra Max II 595
• Graco King 395
• Graco Mark V ProContractor
• Graco Magnum ProX19

Product Description

The Graco 120088 Screw Hex 3/8-16 x 4 is a precision-engineered replacement designed for high-pressure airless sprayer assemblies. Manufactured to OEM standards, this screw ensures reliable thread engagement, consistent clamp force, and long-lasting performance in demanding fluid handling environments.

• Standard 3/8-16 thread: Seamless integration with Graco airless sprayers
• Hardened steel construction: Corrosion-resistant for extended durability
• Precision-machined hex head: Secure tightening and torque retention

Key Features

• Grade 8 steel for high tensile strength and durability
• Zinc phosphate plating for corrosion resistance
• Maintains preload retention under high-pressure conditions
• Compatible with diaphragm units, piston pumps, and manifold blocks
• Ideal for both commercial and residential coating applications

Maintenance Tips

• Inspect threads and head for galling, corrosion, or deformation every 500 hours of use
• Use PTFE-based lubricant for easier removal and prolonged service life
• Follow manufacturer torque specifications to prevent over-tightening

Frequently Asked Questions