Graco 114381 Screw BHC 10-24UNC x .375

Graco 114381 BHC Screw 10-24UNC x .375: High-Strength Fastener for Diaphragm Pumps and Spray Gun Assemblies

The Graco 114381 Screw BHC 10-24UNC x .375 is a precision-machined fastener designed specifically for Graco diaphragm pumps and professional spray gun assemblies. Featuring a robust button head cap (BHC) design, this high-tensile stainless steel screw provides a secure and flush engagement in critical fluid-handling components. With a 10-24 UNC thread profile, ±0.002 inch manufacturing tolerances, and a .375 inch shank length, the screw delivers consistent preload for sealing elements while minimizing stress concentrations in pump manifolds. Its compatibility with airless sprayer configurations and durable finish ensures reliable performance when applying professional coatings in demanding industrial environments.

• Thread: 10-24 UNC precision-machined male thread ensures secure fastening in high-vibration assemblies.
• Head Type: Button Head Cap (BHC) profile for uniform torque distribution and improved load-bearing surface.
• Length: .375" shank engagement optimized for robust seal compression in pump and spray gun housings.

Crafted from premium-grade 17-4 PH stainless steel, the Graco 114381 screw undergoes a multi-stage heat treatment process to achieve a yield strength exceeding 160 ksi. This material grade offers excellent resistance to corrosion and chemical attack, crucial in high-pressure filtration systems and solvent-borne coating applications. The screw head and shank surfaces are shot-peened and passivated to optimize friction coefficients during assembly, enabling precise torque control down to ±2% variance. Standard zinc-nickel or electroless nickel plating is available for enhanced salt spray resistance and electrical conductivity when grounding is required. Manufacturing tolerances adhere to ASME B107.100 and ISO 965-2 standards, ensuring interchangeability in global production and maintenance operations. Such material integrity directly contributes to extended seal longevity and uninterrupted operation in continuous-duty equipment.

Engineered for seamless integration in both air-operated and electric diaphragm pumps, the Graco 114381 screw BHC 10-24UNC x .375 facilitates rapid assembly and maintenance cycles on field service trucks and in plant installations. The BHC profile yields a low-profile head that reduces interference with adjacent components such as gaskets, diaphragms, and filter cartridges, preserving critical fluid pathways during high-pressure filtration. Finite element analysis (FEA) of the screw geometry confirms uniform stress distribution under clamping loads, optimizing clamp joint reliability and enhancing pump efficiency across variable flow rates. Combined with precision thread engagement, this design minimizes micro-leakage and contributes to improved diaphragm life. For critical applications, recommended torque values range from 60 to 80 in-lbs, calibrated against torque-tension coefficients to ensure reproducible preload. The head recess option accommodates 5/32" hex tools for rapid installation in confined spaces. This fastener ensures consistent seal longevity under cyclic pressure variations and thermal cycling environments.

Performance testing on the Graco 114381 BHC screw in lab conditions demonstrates a minimum ultimate tensile strength of 130 ksi and an average fatigue life exceeding 10 million cycles at 50% yield stress. Comparative pulse fatigue trials under simulated spray operations reveal negligible elongation after 500,000 actuation cycles, validating the component’s structural robustness in heavy-duty applications. Torque-angle testing yields a consistent torque to tension conversion factor (K-factor) of 0.18 for electroless nickel-plated variants, enabling repeatable clamp loads across multiple service events. This precision metric ensures compatibility with both legacy and next-generation Graco pump modules and supports high-volume manufacturing workflows. Dimensional inspections maintain a root diameter tolerance of -0.001/+0.002 inches, critical for thread engagement and vibration resistance. The button head cap style facilitates tool alignment and minimizes cam-out risk, ensuring maintenance crews can apply correct preload without slippage in confined spray gun housings.

Field technicians appreciate the ergonomic profile and repeatable torque interface of the Graco 114381 screw in diverse operational environments, from offshore rigs to high-volume paint lines. Its uniform head diameter and smooth flank transitions simplify automated assembly robotics used in professional coatings machinery, reducing cycle times by up to 15%. During scheduled maintenance intervals, crews employ torque-limiting wrenches and automated sensors to verify fastener preload, enabling data-driven inspections and predictive replacement based on torque retention trends. Integration with Graco’s proprietary seal kits ensures consistent diaphragm seating and minimizes downtime due to fluid leaks. The screw’s standardized dimensions allow backward compatibility with earlier pump generations, simplifying spare parts inventory and maintenance training. This balance of precision engineering and practical usability underscores its role in high-throughput coating systems and critical fluid control assemblies.

In conclusion, the Graco 114381 Screw BHC 10-24UNC x .375 represents a convergence of high-strength materials, precision manufacturing, and application-specific design for fluid handling and finishing equipment. From stringent material certifications to validated performance metrics, every aspect of this fastener is optimized for durability and repeatable service in demanding industrial coatings and pump systems. Its compatibility with both legacy and next-generation Graco components streamlines integration, while rigorous quality control processes guarantee consistent torque-to-tension relationships. Engineers and service professionals rely on the 114381 screw to maintain operational continuity, safeguard seal integrity, and support long-term pump efficiency in critical applications.