S-91253A010 10-32 x 1" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
• Precise Class 3A thread fit ensures reliable engagement and vibration resistance in critical assemblies
• High tensile strength of 130,000 PSI provides superior load-bearing capacity for demanding applications
• Rockwell C39 hardness rating delivers excellent wear resistance and long-term durability
• 82° countersink angle allows for flush mounting in precision-machined components
• Hex drive design enables secure installation with standard tools, reducing slippage risks
• Full threading along 1" length maximizes grip strength across the entire fastener engagement

Professional Applications & Engineering Value

These 10-32 UNF flat head screws with Class 3A thread fit are engineered to solve critical fastening challenges in precision machinery, aerospace components, and electronic enclosures. The black-oxide alloy steel construction combined with 130,000 PSI tensile strength prevents thread stripping under high vibration loads, while the fine thread spacing maintains clamping force in thin-section materials. The 82° countersink profile ensures seamless integration with machined surfaces, eliminating protrusions in tight-tolerance assemblies. These fully threaded hex drive screws meet rigorous industrial standards, making them ideal for applications requiring reliable performance in automated manufacturing systems and precision equipment where fastener failure is not an option.

Specification Summary & Compliance

Manufactured to ASME B18.3 and ASTM F835 specifications with Class 3A thread tolerances for precision fit. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Features UNF fine threads with right-hand direction and standard flat head profile for consistent performance across industrial applications.