Engineered for demanding applications, the Graco 111801 Cap Screw delivers exceptional strength and precision in advanced industrial spraying setups. This hex head fastener is ideal for securing critical components in your airless sprayer, ensuring leak-free operation and consistent performance. Integrate it seamlessly with other airless sprayer accessories to optimize fluid flow and maintain professional coatings standards. Its robust design supports high-pressure filtration requirements, reducing downtime and enhancing durability under continuous operational use.
Built from hardened alloy steel, the cap screw withstands corrosion and heavy vibration, extending tool life in demanding environments. Precision machining ensures a snug fit with pump assemblies and seals, while the bright zinc finish resists wear and rust. Pair it effortlessly with a graco airless paint sprayer hose for seamless integration, creating a reliable connection that supports consistent pressure delivery. Trust this component to minimize maintenance and uphold peak performance day after day.
$8.17The Graco 111801 Cap Screw is a precision-engineered fastener designed for critical applications in high-pressure pump assemblies, especially within modern airless sprayer configurations. Featuring a rugged hex washer head, this cap screw ensures uniform load distribution across pump manifolds, fluid sections, and structural housings. Its design maintains alignment of internal seals and pistons, delivering consistent seal compression and minimizing leak paths under dynamic cycle loading. By maintaining exact tolerances in head height and thread pitch, the 111801 screw contributes to overall system integrity and extends mechanical life in professional airless sprayer operations. Optimized for rapid assembly and disassembly, it supports quick service intervals without compromising long-term torque retention.
Routine maintenance on Graco fluid sections often leverages the Graco 111801 Cap Screw to secure manifold plates and cylinder assemblies. In combination with the genuine Graco service hardware list, technicians performing a graco pump repair kit overhaul achieve exact clamp loads, critical to preventing seal extrusion and galling at pressures exceeding 3,000 psi. Torque specifications around 20 Nm are verified with calibrated wrenches, promoting consistent preload across the screw array. This ensures stable fluid metering and reduces variations in stroke length. By controlling clamp force, the system minimizes cyclical fatigue on pump seals and components, enabling predictable performance in demanding spray cycles.
The Graco 111801 cap screw is forged from premium grade 8 alloy steel and undergoes precise quench and temper cycles to achieve a yield strength of 110 ksi and tensile strength of 120 ksi. An electrophoretic zinc-nickel finish provides superior corrosion resistance in harsh chemical environments, making it compatible with a range of solventborne and waterborne agents used in professional coatings applications. Surface passivation reduces galling when threaded into anodized aluminum or coated pump housings. Technicians integrating this component within a graco pump kit benefit from consistent material performance and extended service intervals, enhancing overall system durability.
Under cyclic loading, the Graco 111801 Cap Screw maintains clamping integrity for millions of strokes, resisting relaxation through controlled thread run-out and precision flank geometry. Fatigue testing under pressurization scenarios exceeding 3,500 psi confirms a mean endurance limit above 80 ksi, critical for applications involving high-pressure filtration loops. Torque-to-yield procedures optimize preload without surpassing the yield threshold, ensuring a consistent safety margin. When paired with a well-calibrated graco piston rod assembly, this fastener supports stable volumetric output and precise stroke modulation, even under aggressive duty cycles. Detailed performance metrics validate its role in sustaining system repeatability and minimizing unplanned downtime.
The Graco 111801 Cap Screw incorporates a six-sided head geometry with a nominal 10 mm width across flats, facilitating easy access in compact pump heads. The integrated washer face ensures uniform bearing pressure, reducing surface deformation under high assembly torque. Standard 1.25 mm thread pitch provides rapid engagement without compromising thread shear strength. Precision machining yields concentricity within 0.05 mm, critical for maintaining shaft alignment and consistent contact with pump gaskets. Proper head clearance enhances tool fit and torque transfer, directly impacting pump efficiency by minimizing energy loss due to misalignment and uneven clamp distribution in fluid end assemblies.
To achieve optimal clamp force and maintain seal integrity, technicians should apply a thin film of anti-seize compound on screw threads and bearing face before installation. Recommended torque sequence follows a crisscross pattern to equalize stress across the pump cover, with incremental torque steps of 8 Nm, 15 Nm, and final 20 Nm. Through proper tightening methodology, screw preload remains stable, extending seal longevity and preventing micro-leakage in chemical delivery circuits. Periodic inspection for thread wear and head distortion is advised during routine servicing intervals, ensuring continued performance and facilitating preventive repairs in advanced pump servicing workflows.
In industrial airless sprayer systems, the Graco 111801 cap screw plays a vital role in securing fluid sections during the delivery of viscous materials such as elastomeric sealants, epoxy primers, and polyurethane topcoats. Its robust design and precise tolerancing enable reliable performance in continuous operations, including concrete resurfacing, corrosion-resistant line coatings, and commercial-scale paint booths. By maintaining consistent torque and alignment, this fastener contributes directly to predictable volumetric output and reduced maintenance cycles. Integration with advanced pump modules and high-pressure control valves underscores its importance in achieving professional-level finish quality and long-term system reliability.
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