Graco 15F503 Screw Set SH 3/8-24 UNF

The Graco 15F503 Screw Set SH 3/8‑24 UNF is a precision OEM replacement part for Graco airless sprayers, ensuring secure and reliable assembly.

Socket‑head set screw, 3/8‑24 UNF thread
Compatible with Ultra Max 1095, 1595 & GMAX 5900
Durable, lightweight, and easy to install
Maintains equipment integrity and performance

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Description

Overview

The Graco 15F503 Screw Set SH 3/8‑24 UNF is a high-quality OEM replacement part designed for Graco airless spray systems. This precision-engineered socket-head screw provides secure fastening in critical spray-system components, maintaining equipment reliability and performance.

Compatible Machines

Graco Ultra Max II 1095 (Hi‑Boy and compatible series)
Graco Ultra Max II 1595 (Hi‑Boy and compatible series)
Graco GMAX II 5900 (Lo‑Boy and Hi‑Boy / Convertible / Standard series)

Specifications

Parameter	Value
Part Number	15F503
Type	Socket-head set screw
Thread Size	3/8‑24 UNF
Unit Weight	≈ 0.05 lbs (≈ 0.023 kg)
Unit Dimensions (pkg)	≈ 1.2 in × 1.2 in × 1.2 in
Origin / OEM Status	Genuine Graco replacement part

Key Features

OEM-grade precision ensures correct thread tolerance
Durable socket-head design for heavy-duty use
Compact and lightweight for easy installation
Maintains structural integrity of spray system components
Wide compatibility across multiple Graco airless sprayers
Reliable replacement reduces risk of equipment damage

Installation & Maintenance

Install the 15F503 screw by matching the 3/8‑24 UNF thread and applying the manufacturer-recommended torque. Inspect periodically for wear, corrosion, or thread damage, and replace if necessary. Using genuine OEM parts ensures long-term reliability and maintains equipment warranty.

Frequently Asked Questions

The 15F503 is a socket-head set screw used as an internal fastener in Graco airless spray assemblies, securing components such as bearing housings, latches, or pump sections.

Yes, the 15F503 screw is compatible with Graco Ultra Max II 1595 series (Hi-Boy and compatible versions).

It is not recommended. Using a non-OEM screw may cause incorrect thread fit, loosening, or equipment damage and can void the warranty.