The Graco 122667 Hexagonal Head Washer Drill Screw offers reliable performance for demanding industrial applications. Designed for seamless integration into spray pumps and fluid-handling systems, this drill screw ensures secure fastening and optimal seal integrity. Compatible with a wide range of airless equipment, the hex washer head design delivers consistent torque and alignment for maintenance tasks involving an airless sprayer. Thanks to its compact dimensions of 0.75 x 0.25 x 0.25 inches and lightweight 0.005-pound structure, technicians can retrofit existing assemblies without bulk, ensuring precise installation in tight clearances.
Ideal for integrating into professional coatings systems, this screw enhances maintenance protocols and ensures consistent quality across production lines. Its robust build supports high-pressure filtration environments, delivering long-lasting performance that meets industry standards for durability and precision.
$2.74Graco 122667 Hexagonal Head Washer Drill Screw is a precision engineered fastener designed for critical fluid handling and coating equipment. Manufactured to OEM tolerances, this part is constructed from high-strength alloy steel with an external hexagonal head and integrated washer bearing surface. With nominal dimensions of 0.75 inches in length and a head diameter of 0.312 inches, and weighing approximately 0.005 pounds, this screw provides a compact footprint suitable for confined pump manifolds. The head geometry ensures uniform load distribution across sealing assemblies while the self-drilling tip enables installation in blind or prepped holes. This screw forms an ideal interface between housing flanges and sealing elements in high-performance pump stations, including airless sprayer systems utilized by coatings professionals.
Thread geometry on the Graco 122667 unit features a precision-rolled profile with a nominal pitch of 36 threads per inch, designed to engage seamlessly with stainless steel pump housings and composite manifold inserts. The integrated hexagonal head accepts standard 5/32-inch Allen keys or 5/16-inch sockets, offering secure drive torque capacity up to 15 inch-pounds without galling. This configuration enhances seal compression uniformity and maintains consistent leak-free operation under cyclical load conditions. Ideal for systems handling viscous agents, the screw supports reliable operation in high-temperature varnish lines and abrasive resin circuits. When used in conjunction with professional coatings modules, it helps preserve pump efficiency by minimizing backlash and optimizing clamping pressure. Maintenance cycles benefit from the self-drilling feature, which reduces installation time and ensures precise alignment of sealing surfaces in confined equipment bays.
The screw is forged from AISI 8740 chromoly steel alloy, chosen for its exceptional fatigue resistance and yield strength. Post-machining, components undergo zinc-nickel plating to achieve corrosion resistance exceeding 1,000 hours in neutral salt spray tests. The integrated washer head incorporates a phosphate conversion layer, enhancing surface wetting during lubricant application and extending seal longevity. Critical surfaces are shot-peened to induce beneficial compressive stress, mitigating crack propagation under vibration. Precision tolerance control on shaft diameter maintains interference fit within 0.001 inch, supporting consistent clamping performance.
Tensile strength ratings exceed 150,000 psi due to the selection of high-hardness alloy substrates. Shear resistance registers above 90,000 psi, ensuring robust retention in manifold assemblies. Torque-to-yield analysis yields a breakaway threshold of 20 inch-pounds, while recommended operational torque ranges between 10 and 15 inch-pounds to prevent material deformation. Fatigue testing over one million cycles under fluctuating axial loads demonstrates negligible reduction in preload force. Thread engagement depth of at least five full threads in steel glands optimizes axial load distribution. Pressure endurance ratings surpass 5,000 psi in closed-loop circuits. These metrics align with ISO 898-1 standards for fastener mechanical properties.
The Graco 122667 screw finds utility in diverse fluid power and coating delivery systems where stringent performance criteria apply. It secures manifolds in air-operated piston pumps, rotary gear pumps, and diaphragm modules, delivering consistent preload and alignment. Applications include ultra-fine atomization nozzles, abrasive slurry circuits, and solvent recovery loops. The component supports precision metering in high-pressure filtration skids and industrial spraying rigs, ensuring repeatable flow control. Its compact geometry is optimized for integration within robotic spray booms and automated coating lines. Compatibility with conductive housings also enables use in electrostatic atomization platforms for improved transfer efficiency. Fastener reliability in these contexts underpins long-term seal performance and system uptime.
Prior to installation, verify substrate material hardness and clean mating surfaces to remove particulate debris. Pre-drilling with a 0.20-inch pilot hole is recommended when anchoring in high-yield steel or composite liners. For optimal preload, apply a medium-strength thread locker or compatible grease to guard against micro-movements in high-vibration environments. Engage the screw with controlled torque ramping, targeting 12 inch-pounds, to achieve reliable clamping without exceeding breakaway thresholds. Periodic inspection intervals should align with scheduled pump maintenance, focusing on head torque retention and washer surface integrity. When disassembling, apply counter-clockwise torque slowly to prevent cam-out. Proper installation extends seal longevity, maintains pump efficiency, and reduces unscheduled downtime in professional applications.
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