The Graco 100518 Pan Head Machine Screw (PNHD) ensures secure connections in demanding spray systems. Crafted from premium steel, this screw is ideal for maintaining optimal pressure and flow in your graco paint machines. Its wide pan head design provides a larger surface area for enhanced grip and load distribution, while precision threading ensures leak-free assemblies. Engineered to withstand intense wear, it supports superior seal integrity and works seamlessly with your airless sprayer components.
Designed to fit Predator proportioners, it integrates easily within complex assemblies. When consulting a graco 395 parts diagram, you’ll find this fastener positioned to optimize seal performance and reduce wear under heavy-duty use. Its corrosion-resistant finish and precise manufacturing ensure durability, supporting uninterrupted operation and consistent application of professional coatings in demanding environments with high-pressure filtration systems.
$7.94Engineered for precision fastening in high-pressure proportioning units, the Graco 100518 PNHD machine screw offers a pan head profile optimized for uniform clamping and minimal material distortion. Its enlarged bearing surface distributes clamp loads evenly across sealing interfaces, critical for maintaining leak-free operation in airless sprayer modules. Ideal for professional coatings applications, this screw integrates seamlessly with manifold assemblies where stringent torque control is required to preserve component integrity. Proven in closed-loop pumping systems, the PNHD screw’s geometry supports reliable anchoring of filter housings and pressure regulators, contributing to consistent fluid delivery and optimal finish quality in demanding industrial environments. Its robust performance is validated in large-scale industrial finishing lines.
Manufactured from premium-grade stainless steel with a minimum 17-4 PH equivalent composition, the 100518 screw exhibits exceptional tensile strength exceeding 1,200 MPa and a Rockwell Hardness rating above 40 HRC. The cryogenic treatment and precision heat-treat cycle refine grain structure, enhancing fatigue resistance under cyclic pressure spikes typical of high-pressure filtration loops. Surface passivation and phosphate conversion coating provide a robust oxidation barrier without compromising thread tolerances. Fatigue life is further optimized by CNC finish passes maintaining thread concentricity within 0.01 mm tolerances. This material synergy extends seal longevity by mitigating galvanic corrosion when interfacing with aluminum or composite manifolds, safeguarding performance parameters across temperature and pressure variances in professional coating operations.
Pan head geometry obeys ISO 7046 dimensional constraints, featuring a nominal 7.3 mm head diameter and 2.5 mm height, optimized to mate with standard countersunk and surface-flush mounting systems. The 18-8 DIN 7985 thread profile at 1/4-20 UNF conforms to aerospace-grade tolerances, enabling consistent thread engagement and precise preload distribution. A low-friction zinc phosphate coating reduces required insertion torque to specified 5 Nm values while resisting galling during dynamic assembly. Machined thread root radii minimize stress concentration points, enhancing shear load capacity by up to 15% compared to coarse-thread alternatives. Detailed torque spec sheets guide installation with calibrated wrenches or torque screwdrivers to achieve uniform clamp loads critical for high-pressure applications.
Integration of the 100518 PNHD screw into proportioning pump modules enhances overall pump efficiency by securing high-precision manifolds and filter cartridges without inducing microleaks. The screw’s pan head profile ensures stable seating of sealing gaskets and o-rings, preventing pressure differentials from compromising metering accuracy. In airless pump circuits, the PNHD fastener withstands dynamic pulsation cycles exceeding 3,000 psi, transmitting clamp forces evenly to safeguard internal diaphragms and valve assemblies. Routine inspection protocols recommend torque verification at service intervals, preserving seal longevity and mitigating the risk of performance drift. Coupling with advanced high-pressure filtration systems, this fastener supports continuous operation under abrasive particle loads found in specialized professional coatings formulations.
Though nominally a component in proportioner frames, the 100518 PNHD machine screw is compatible across a range of Graco sprayer platforms. Its standardized 1/4-20 UNF dimensions and controlled head geometry interface directly with mounting brackets on high-volume devices such as the graco 395 airless paint sprayer, enabling fastener interchange during maintenance cycles without custom adapters. Field assessments confirm that integration with the graco 490 paint sprayer results in unchanged calibration tolerances and repeatable diaphragm alignment, essential for reproducible spray quality. Similarly, when retrofitting advanced pump heads on the graco 695 paint sprayer, the PNHD screw maintains consistent preload, delivering reliable seal compression and preventing flutter in high-speed purge operations. This cross-platform adaptability reduces logistic complexity in field service operations and supports uniform part management across diverse equipment inventories.
When installing the Graco 100518 PNHD screw within airless sprayer proportioners, technologists should adhere to calibrated torque cycles using digital torque fastening tools calibrated to ±2% accuracy. Pre-assembly cleaning of bores and thread holes with solvent-dried lint-free wipes ensures no particulate contamination impairs sealing interfaces. Where repeated service is anticipated, use of thin-film lubricant on the bearing face can improve torque retention without compromising clamp friction requirements. Regular inspection intervals every 200 operational hours confirm that head bow and shank straightness remain within 0.02 mm, preventing stress risers that may lead to fatigue fractures. These best practices maximize the lifespan of critical fasteners, ensuring reliable operation in demanding professional coating environments.
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