Graco 108795 Pan Head Machined Screw

Precision Pan Head Machined Screw 108795 for High-Pressure Airless Sprayer Applications

Engineered for demanding environments, the Graco 108795 pan head machined screw delivers exceptional stability in airless sprayer and professional coatings assemblies. Constructed from premium AISI 316 stainless steel, this OEM replacement features a precision-engineered pan head with a flat bearing surface that maximizes clamping distribution while resisting loosening under high cyclic pressures. The through-hardened shaft presents a uniform Rockwell hardness of Rc 35–40, ensuring resistance to galling and thread wear during repetitive service cycles. When consulting the Graco manuals, technicians will note that this part adheres strictly to ISO 14583 dimensional standards for metric screws. Ideal for maintaining consistent pressure and alignment in dynamic fluid conveyance modules. A satin nickel plating offers enhanced corrosion protection without compromising the surface finish requirements for sealing elements and O-ring seating.

• 316 stainless steel composition for maximum corrosion resistance.
• Pan head geometry optimized for flat clamping and torque control.
• Precision-machined threads ensure repeatable torque-tension relationships.

In system calibration routines and component audits, the 108795 screw is referenced explicitly in the graco parts list as part number 18 for the Graco UltraMax II Mark V series. Its M6 x 20 mm thread profile achieves 0.5 mm pitch with a class 8g fit, delivering precise preload values that enhance pump efficiency and minimize micro-movements at joint interfaces. Combined with specialized sealing washers, it complements high-pressure filtration assemblies by preserving microscopic clearance for proper fluid throughput. Torque specifications typically range between 5.5 Nm and 7.0 Nm to maintain optimal clamping force without exceeding shear limits, ensuring reliable performance under sustained operating pressures of up to 3,500 psi.

For maintenance teams working on multi-component systems, compatibility across legacy modules and next-generation units is critical. The 108795 screw integrates seamlessly into a variety of gun heads, manifold blocks, and fluid end assemblies in professional sprayer rigs, supporting the broadest range of graco sprayers configurations. Its head height of 3.2 mm and 10 mm diameter pan head create uniform seating against O-ring seals, thereby significantly extending seal longevity and reducing downtime. Utilize a calibrated torque wrench with a crowfoot adapter to ensure proper seating without inducing excess friction. Detailed service bulletins emphasize periodic inspection protocols every 1,000 service hours to monitor thread integrity and head deformation under cyclic loading.

In advanced engineering applications, the consistent geometry of the pan head facilitates precise alignment in modular sprayer frames and quick-change couplings. Finite element analysis of the head-to-shaft transition zone has demonstrated stress concentrations below 60% of the material yield strength, enabling long-term reliability even under fluctuating thermal cycles. Surface roughness values are held to Ra 0.8 μm to support membrane and diaphragm seating surfaces without introducing leak paths. The uniform plating thickness of 8–12 μm provides an optimal balance between corrosion resistance and surface friction, which is critical when integrating with polymer-based fluid seals and composite coatings. This engineered finish also optimizes chemical compatibility across solvent-based and waterborne formulations, ensuring that coatings development labs and on-site contractors can rely on consistent component behavior.

Material characterization tests have validated that the core material exhibits a minimum tensile strength of 600 MPa and 20% elongation at break, conforming to ASTM A320 grade standards. The satin nickel finish enhances surface passivation, reducing galvanic reactions when paired with aluminum or brass components. Dimensional tolerances are held to ±0.1 mm across all axes, ensuring interchangeability in automated assembly lines. Thread straightness and lead angle precision are controlled within 0.2° to maintain consistent torque-tension curves. A thin-film lubricant application is recommended to stabilize friction coefficients and protect thread roots during initial assembly. These attributes are essential for preserving fluid integrity in high-pressure sealing interfaces and preventing micro-leakage in dynamic control valves.

Authenticity is guaranteed by OEM sourcing and direct cross-reference to Graco’s official documentation, supporting seamless integration into spray pump assemblies and air control modules. Technicians will appreciate the straightforward replacement process enabled by direct drop-in fitment and uniform head profile, which aligns with existing countersink configurations. Operating temperature ranges from –20°C to 150°C, accommodating thermal extremes encountered in exterior spray booths and industrial coating lines. By adhering to these design parameters, this pan head machined screw ensures sustained operational performance through rigorous quality standards. Whether addressing routine maintenance or retrofitting legacy systems, the 108795 screw stands as a critical component in achieving peak equipment reliability and fluid delivery precision.