This precision-engineered cap screw is crafted to meet the demanding requirements of professional finishing tools. Compatible with airless sprayer setups, it provides secure fastening and prevents loosening under high-pressure filtration conditions for consistent performance. Its durable construction withstands repeated assembly and disassembly, ensuring long-term reliability. For accurate installation, consult the graco 395 parts diagram to ensure seamless integration with your existing assembly.
Designed specifically for high-volume production environments, this cap screw enhances reliability in heavy-use spray systems. When used with a spray paint gun graco, it maintains consistent pressure control and supports the application of professional coatings, delivering flawless results on every project. Its precision-machined thread profile ensures optimal alignment and sealing performance under critical conditions. Ideal for integration into multi-layer coating lines, it contributes to the durability and lifespan of your equipment.
$9.69Originating as a critical hardware element within Graco’s fluid handling systems, the 100049 Hex-Head Cap Screw is engineered for secure assembly of pump manifolds and spray-gun modules. Crafted to ISO 898-1 standards, this fastener delivers consistent clamp loads under cyclic pressures typical of high-volume industrial finishing. The compact hex head geometry accommodates torque-driven installation with standard sockets and impact drivers, optimizing changeover times in complex rigs. Precision threading conforms to unified fine pitch specifications, ensuring uniform preload distribution and eliminating micro-gaps that compromise seal integrity. When integrated with other graco paint sprayer gun parts, the 100049 cap screw maintains structural alignment in dynamic systems, supporting consistent fluid conveyance and spray-pattern stability critical to professional environments.
The core shank of the 100049 screw is machined from quenched and tempered chromium-molybdenum steel, delivering high-yield properties and fatigue resistance in recurrent load cycles. After precision CNC machining, each fastener undergoes a proprietary nitriding treatment to elevate surface hardness and enhance corrosion resistance. A secondary electrophoretic deposition coating provides a uniform seal against chemical attack from solvents and pigments used in professional coatings operations. The combination of nitriding and e-coat layers also mitigates galling at the thread interfaces, reducing installation torque variability. By maintaining a smooth finish with Ra ≤0.8 μm on critical contact surfaces, the screw supports dependable operation within high-pressure filtration manifolds and spray pump assemblies.
In laboratory evaluations, the 100049 cap screw demonstrates exceptional durability across 10,000+ torque cycles at 75–100 Nm installation torque, surpassing typical maintenance intervals in heavy-duty finishing equipment. Creep and relaxation tests confirm minimal preload loss under sustained multi-hundred-bar working pressures, translating to improved pump efficiency and reduced vibration-induced loosening. Endurance testing in salt-spray chambers shows negligible surface corrosion after 1,000 hours, validating its suitability for harsh industrial environments. The inherent design resists thread stripping and head rounding, ensuring reliable fastener removal during overhaul procedures and minimizing the risk of bonded failures that can halt production in critical coatings applications.
Torque installation of the 100049 cap screw falls within a reproducible range of 75–85 Nm, calibrated to achieve optimal clamp load without exceeding the material’s yield threshold. A controlled torque gradient prevents overtensioning and preserves the integrity of accompanying O-rings and gasket seals. Tightening sequences following cross-pattern protocols help distribute clamping forces evenly, enhancing seal longevity in high-temperature or solvent-rich media. Finite element analysis confirms uniform stress dispersion along the head-to-shank fillet radius, reducing stress concentration points that can lead to microfractures under dynamic loading. These metrics are essential for maintaining leak-free joints in airless sprayer heads and pump manifold covers.
Replacement of worn or corroded screws in spray-gun assemblies should be performed as part of scheduled preventive maintenance. Technicians leveraging factory-specified graco pump repair kits gain access to matching fasteners, seals, and backup rings designed for seamless interchange. Proper tool selection—favoring calibrated torque wrenches over pneumatic tools—ensures adherence to recommended torque values. Periodic inspection for thread deformation and head wear can preempt galling issues in high-pressure filtration lines. Integrating this cap screw into standard graco repair kits streamlines inventory management and supports rapid field servicing of airless sprayer units employed in automotive, marine, and architectural coatings projects.
The Graco 100049 Screw, Cap Hex HD exemplifies high-performance fastener engineering optimized for demanding fluid control systems. Its alloy-steel substrate, advanced surface treatments, and precise dimensional control deliver superior clamp stability, corrosion resilience, and fatigue resistance. Adhering to specified torque protocols and incorporating regular inspection cycles enhances pump efficiency and prevents seal failures. By selecting components that align with rigorous quality and testing criteria, maintenance teams can achieve uninterrupted operation of airless sprayer equipment, uphold professional coatings standards, and extend service life across diverse industrial applications.
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