Graco 119791 Torx Hex Washer Head Machine Screw

The Graco 119791 Screw Mach Torx Hex Wash Hd is a high-strength OEM fastener designed for precision assembly and reliable sealing in Graco sprayers.

Part #: 119791
Head Type: Torx Hex Washer
Material: 17-4 PH Stainless Steel
Surface: Nitrided for added hardness
Fits: GH Series, GMAX II, Ultra Max II, LineLazer

$19.2

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Description

Graco 119791 Torx Hex Washer Head Screw Specifications

Compatible Machines

Graco GH Series
Graco GMAX II Series
Graco Ultra Max II
Graco LineLazer Series

Product Overview

The Graco 119791 Screw Mach Torx Hex Wash Hd is a high-strength fastener engineered for Graco airless sprayers and coating systems. Made from 17-4 PH stainless steel with a precision Torx hex washer head, it provides excellent corrosion resistance, superior torque transfer, and consistent sealing under pressure.

Key Features

OEM Part Number: 119791
Material: 17-4 PH Stainless Steel
Head Type: Torx Hex Washer Head
Surface Treatment: Nitrided for enhanced hardness
Provides 25% higher torque capacity with six-lobe design

Technical Specifications

Specification	Details
Part Number	119791
Thread Class	6g Precision Tolerance
Material	17-4 PH Stainless Steel
Drive Type	Torx Hex (Six-Lobe)
Surface Hardness	Rc 55 (Nitrided Finish)
Tensile Strength	1500 MPa
Torque Capacity	Up to 12 N·m
Applications	Airless sprayers, pump manifolds, valve blocks, and sealing assemblies

Performance Benefits

Ensures consistent clamp force under high-pressure conditions
Improves uptime with simplified maintenance and high wear resistance
Reduces torque loss and prevents cam-out in high-vibration setups
Designed for reliability in professional coatings and fluid systems

Frequently Asked Questions

The Graco 119791 is made from 17-4 PH stainless steel, chosen for its superior strength and corrosion resistance, and is nitrided for increased surface hardness.

Yes, the screw can be used in compatible systems that require the same Torx hex washer head and thread class. Always verify size and torque requirements before installation.

Apply a small amount of molybdenum disulfide paste to the threads, and torque in a cross pattern to the manufacturer’s specification (typically 10–12 N·m) for uniform preload and seal integrity.