Graco 128726 Phillips Pan Head Machine Screw

Precision Pan Head Machine Screw for High-Pressure Fluid Handling

Graco 128726 Phillips Pan Head Machine Screw is a precision-engineered fastener optimized for high-performance fluid handling systems. As an OEM component specified by Graco, SKU 128726, GTIN 00755652654056, this fastener features a Phillips drive interface for reliable torque transmission and repeatable installation. Defined head geometry ensures uniform load distribution beneath the fastener head, reducing stress concentrations in pump housings and mounting flanges. Machined from corrosion-resistant stainless steel, the screw offers enhanced durability in abrasive or chemical environments. Integration supports parameters such as seal longevity and pump efficiency in advanced spray systems. Minimal protrusion above mating surfaces promotes low-profile assembly in compact pump modules.

• Pan head diameter: 14 mm seating surface optimized for uniform load.
• Phillips drive type: #2 cross recess for controlled torque application.
• Material: 316 stainless steel, ASTM A182 compliant, passivated finish.

Engineering integration of the Graco 128726 screw extends across airless sprayer modules and industrial pump assemblies. The pan head’s radial seating surface is optimized to secure gasket and O-ring interfaces, maintaining leak-free connections in high-pressure filtration stages. Phillips drive engagement depth is calibrated to reduce cam-out risk and ensure precise torque application, critical for retaining consistent seal compression in dynamic fluid circuits. Design specifications detail M8 thread pitch with fine tolerances, facilitating compatibility with cast aluminum and steel components. Finite Element Analysis verifies head deflection under preload, reinforcing assembly integrity in professional coatings dispensers and automated spray robots. Engineers also leverage thread lubrication protocols to maximize corrosion resistance and minimize maintenance cycles.

Manufactured from 316 stainless steel, the Graco 128726 Phillips Pan Head Machine Screw exhibits exceptional chemical resistance and mechanical strength. Material selection aligns with ASTM A182 standards, delivering yield strengths above 30 ksi and tensile ratings exceeding 70 ksi. Passivation treatment enhances surface uniformity, effectively reducing oxide inclusions and improving professional coatings applications environments. The screw’s Vickers hardness rating is carefully controlled between 150 and 200 HV to prevent thread galling during torque cycling. Microstructure analysis confirms absence of martensitic phases, preserving ductility under vibrational loads. Optional electro-polishing can further lower surface roughness to Ra 0.4 microns, enhancing wettability and reducing contamination in filtration rigs. This robust composition ensures consistent performance in both low-temperature and elevated-heat service conditions, supporting continuous operation of fluid conveyance pumps and high-volume dispensing systems.

Performance metrics for the Graco 128726 screw have been characterized under controlled test protocols. Static torque-preload curves demonstrate a median clamp load of 4 kN at a recommended tightening torque of 8 Nm. Fatigue endurance testing yields over 10⁶ cycles at 80% of proof strength, qualifying the fastener for high-vibration pump environments. Corrosion resistance trials conducted in 5% sodium chloride fog show no pitting development after 500 hours, affirming durability in saline or chemical washdown conditions. The screw’s shear strength exceeds 25 kN, providing resilience against lateral loads in hardened manifold assemblies. These quantifiable performance attributes give design engineers confidence when specifying components for high-pressure filtration loops and precision airless sprayer distribution systems.

Optimal installation of the Graco 128726 pan head screw requires calibrated torque wrenches with repeatable settings to preserve thread integrity and prevent over-torquing. Application of molybdenum disulfide or PTFE-based anti-seize lubricant can further enhance pump efficiency by reducing frictional losses within fluid circuits. During assembly of high-pressure filtration vessels, torque-angle monitoring ensures uniform gasket compression, critical for preventing bypass and maintaining filtration separation performance. Routine maintenance schedules recommend periodic re-torque verification to mitigate relaxation effects under thermal cycling. For airless sprayer pumps, alignment jigs facilitate perpendicular insertion, avoiding cross-threading that could compromise manifold sealing surfaces. Detailed torque specification charts provided by Graco engineering services support consistent results across diverse installation scenarios.

Specification of the Graco 128726 Phillips Pan Head Machine Screw is a common practice in the manufacturing of professional coatings dispensers and high-output airless sprayer systems. By integrating this fastener into pump-end covers, valve bodies, and manifold plates, OEMs achieve streamlined assembly workflows and predictable performance benchmarks. The pan head design accommodates diverse sealing media—including PTFE, EPDM, and Viton—while ensuring optimized clamping force for extended seal longevity. When deployed in heavy-duty construction sprayers, the screw’s robust material and precise geometry contribute to minimal downtime and simplified service procedures. Its compatibility with Graco pump modules enables system integrators to maintain consistent pump efficiency, reduce maintenance intervals, and uphold stringent quality standards across global production lines.