Graco 117831 Pan Head Machine Screw

Graco 117831 Screw Mach Pan Hd: High-Precision OEM Pan Head Machine Screw for Industrial Coating Systems

The Graco 117831 Screw Mach Pan Hd is an OEM pan head machine screw engineered for industrial coating equipment, providing precision fastening in Graco airless paint sprayers and related systems. Its low-profile circular head geometry features a slight dome and CNC-machined chamfer, delivering uniform clamping force across flange surfaces and reducing peak contact stress. Constructed from high-grade stainless steel alloys, the screw offers superior corrosion resistance and mechanical reliability in abrasive coating environments. Machined to ISO metric M6 × 1.0 or UNC 10-24 thread standards with tolerances of ±0.05 mm, the part assures accurate thread engagement and consistent torque response. Thread run-out length and internal hex drive design facilitate rapid assembly with minimal risk of cam-out. A controlled surface finish of Ra 1.6 supports optimal sealing when used with O-ring or bonded washer interfaces, essential for maintaining fluid containment in high-pressure pump circuits characteristic of modern airless sprayer installations.

• Precision-machined pan head geometry for uniform load distribution
• ISO metric or Unified thread form with consistent pitch tolerance
• High-grade stainless or alloy substrate with optional surface plating

Manufactured to OEM tolerances, the Graco 117831 pan head machine screw conforms to ANSI B18.6.3 dimension standards and is sourced from Graco’s internal CAD-derived models. Engineers utilize the M6 × 1.0 metric thread or 10-24 UNC variant for compatibility across multiple nozzle assemblies, manifold covers, and pump housing interfaces. The 3 mm head height and 9 mm head diameter are optimized for insertion tools, while the internal hex socket drive enables precise torque application with minimal cam-out. Material options include AISI 316L stainless steel for corrosion resistance or heat-treated alloy 18-8 stainless for enhanced strength. A controlled thread run-out length ensures consistent engagement and prevents cross-threading, while batch testing and Certificates of Conformance verify mechanical properties. The choice of plating—zinc, nickel, or passivation treatments—further tailors environmental performance, safeguarding component integrity and boosting pump efficiency in fluid delivery systems.

In performance testing, the pan head machine screw exhibits tensile strength above 800 MPa, shear resistance exceeding 600 MPa, and repeatable clamp force at applied torque of 4 N·m ± 0.2 N·m. Tight thread engagement ensures negligible elongation under cyclic loading. In high-pressure filtration modules, this screw maintains robust sealing interfaces when mated with O-rings or bonded washers. Combined with professional coatings applied to the pump housing, the fixture minimizes galvanic corrosion and thread galling. The screw’s 360° head profile optimizes contact area against casting flanges, reducing stress risers. It also complies with RoHS and REACH standards for material safety and integrates with quick-disconnect couplings in modular spray assemblies. This level of mechanical reliability supports continuous operation of coating lines in automotive and heavy machinery assembly, yielding predictable flow rates and stable atomization, even under pressures up to 3300 psi.

Assembly and maintenance guidelines call for pre-cleaning of mating surfaces and debris-free threads before torque application to eliminate particulate-induced seal compromise. Recommended torque values range from 3.5 to 5.0 N·m, calibrated according to flange stiffness and material hardness. Application of minimal thread sealant or PTFE tape is advised for fluid media compatibility; use of compatible anti-acid etch lubricants helps sustain repeatable torque cycles. To maximize seal longevity, avoid over-torquing which can distort pan head seat geometry and compromise O-ring seals under cyclic pressure loads. Maintenance intervals every 1,000 operating hours or as defined by system OEM should include visual inspection for thread wear, head deformations, and coating integrity. Replacement of the Graco 117831 screw during preventive maintenance ensures stable clamp force and prevents micro-leakage in solvent-based or waterborne professional coatings operations. Proper tool selection, such as a torque wrench with a hex bit head attachment, enhances assembly accuracy and operator safety in confined pump enclosures.

Design and integration engineers specify the Graco 117831 pan head screw across pump manifold assemblies, valve blocks, and cylinder end caps, leveraging its precise dimensions and material compatibility. It mates seamlessly with 17-4 PH stainless steel housings, anodized aluminum manifolds, and composite polymer modules, ensuring matched thermal expansion rates and preventing stress-induced fatigue in multi-material constructs. The screw’s standardized head thickness of 3.2 mm and diameter of 10 mm ensure uniform preload distribution, while the internal hex drive minimizes cam-out and allows torque controlled assembly even in confined geometries. Full traceability is provided through ISO 9001-certified batch documentation, including heat treatment records and mechanical test reports, satisfying stringent quality assurance protocols. Whether deployed in legacy air-operated pumps or next-generation electro-hydraulic coating systems, this pan head machine screw facilitates rapid field servicing, minimizes system downtime, and underpins consistent atomization performance for demanding industrial and automotive professional coatings applications.