Graco 120089 Screw Hex 3/8-16 x 1.75

Graco 120089 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 120089 Screw Hex 3/8-16 x 1.75 is a durable, precision-engineered fastener for high-performance airless sprayer systems. Crafted from premium alloy steel with a zinc phosphate finish, it provides corrosion resistance and secure fastening in pump assemblies and manifold junctions.

• Hex head design: Efficient tool engagement
• Thread: 3/8-16 UNC for reliable connections
• Length: 1.75 inches for optimal fit
• Material: High-strength alloy steel, corrosion-resistant

Key Features

• Maintains preload under high-pressure conditions (up to 3,000 psi)
• Precision-engineered threads for leak-free sealing
• ANSI-compliant hex head for consistent torque application
• Durable zinc phosphate finish for extended service life
• Used in pump housings, diaphragm units, and filter brackets

Maintenance Tips

• Inspect threads and hex head for wear every 500 hours
• Apply PTFE or molybdenum disulfide lubricants for smooth installation
• Follow manufacturer torque specifications to prevent over-tightening
• Replace at signs of corrosion, deformation, or thread fatigue

Frequently Asked Questions