S-91263A795 1/2"-20 x 1" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated alloy steel construction for extended service life in demanding environments
- Exceptional holding power with 130,000 PSI tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precision thread engagement with Class 3A fit ensuring reliable fastening and vibration resistance
- Optimal flush mounting with standard 82° countersink angle and flat head design for clean, professional finishes
- Easy installation and removal with 5/16" hex drive providing secure tool engagement and torque transmission
- Enhanced thread reliability with UNF fine thread spacing maintaining consistent clamping force under stress
- Full thread coverage along the 1" length for maximum grip and load distribution
Professional Applications & Engineering Value
These zinc-plated alloy steel flat head screws deliver critical performance where high tensile strength and precision thread fit are paramount. The Class 3A UNF thread specification ensures minimal play and superior vibration resistance in machinery, automotive assemblies, and structural frameworks. The 82° countersink angle provides seamless flush mounting in predrilled surfaces, eliminating protrusions while maintaining material integrity. With fully threaded design and Rockwell C39 hardness, these screws distribute stress evenly and resist stripping, making them ideal for repetitive disassembly applications. The corrosion-resistant zinc plating extends service life in industrial environments where exposure to elements is a concern.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread fit tolerances with UNF fine thread (1/2"-20) specifications. Complies with ASTM F835 standards for mechanical properties and dimensional requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance regulations. Features right-hand threading with standard flat head profile and 5/16" hex drive configuration.
