S-94414A363 1/4"-20 x 1 1/4" ASME B18.3, ASTM F835 Alloy Steel Torx Flat Head Screws

Key Features & Benefits at a Glance

• Superior torque transmission with Torx Plus IP30 drive design, reducing cam-out and tool wear during high-torque applications
• Exceptional strength and durability from alloy steel construction with 140,000 psi tensile strength and Rockwell C39 hardness for demanding industrial environments
• Enhanced corrosion resistance through black-oxide surface treatment, providing reliable performance in various operating conditions
• Precise flush mounting with 82° countersink angle and standard flat head profile for seamless surface integration
• Reliable thread engagement with Class 3A UNC coarse threads ensuring secure fastening in diverse materials
• Full-threaded design maximizing grip length and load distribution across the entire fastener length
• Regulatory compliance assurance meeting ASME B18.3 specifications for consistent quality and performance standards

Professional Applications & Engineering Value

These black-oxide alloy steel flat head screws deliver critical engineering solutions for industrial assembly challenges where high-strength fastening and flush surface requirements are paramount. The Torx Plus IP30 drive system eliminates common installation issues like screw head stripping, while the Class 3A UNC coarse threads provide excellent engagement in both metallic and non-metallic substrates. The combination of 140,000 psi tensile strength and Rockwell C39 hardness ensures reliable performance in heavy machinery, automotive assemblies, and structural applications where vibration resistance and long-term durability are essential. The 82° countersink angle facilitates perfect flush mounting in precision equipment and visible surfaces, making these fully threaded fasteners ideal for applications requiring both aesthetic cleanliness and structural integrity.

Specification Summary & Compliance

Manufactured to exacting ASME B18.3 specifications with Class 3A thread fit for superior dimensional accuracy. Features 1/4"-20 UNC coarse threads with right-hand orientation and full threading along the 1-1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. The black-oxide alloy steel construction meets ASTM F835 standards for consistent material properties and performance reliability.