S-91253A354 3/8"-24 x 7/8" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with black-oxide coating, ideal for harsh industrial environments
- Superior tensile strength (130,000 psi) ensures reliable performance under high-stress applications
- Precision Class 3A thread fit provides secure, vibration-resistant fastening in critical assemblies
- Fully threaded design offers maximum grip length and uniform load distribution
- 82° countersink angle enables flush mounting for streamlined surfaces and improved aesthetics
- Hex drive (7/32") compatibility allows for high-torque installation with standard tools
- Compliance with ASTM F835, RoHS 3, and REACH guarantees material safety and regulatory adherence
Professional Applications & Engineering Value
These black-oxide alloy steel flat head screws are engineered to address demanding industrial fastening challenges where strength, precision, and environmental resistance are critical. The UNF fine thread (3/8"-24) and Class 3A fit ensure minimal backlash and superior clamping force in machinery, automotive, and aerospace assemblies. The 82° countersink facilitates seamless integration into tapered seats, reducing protrusion risks while the fully threaded shank maximizes engagement in thick materials. With Rockwell C39 hardness and corrosion-resistant coating, these screws deliver long-term reliability in high-vibration and moderate corrosive environments, making them ideal for OEM and MRO applications requiring ASTM F835 compliance.
Specification Summary & Compliance
This 3/8"-24 UNF flat head screw features a Class 3A thread fit per UNF standards, ensuring precise tolerances for high-strength applications. Manufacturing adheres to ASTM F835 specifications for mechanical properties and dimensional consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted substances. Dimensions include 7/8" length, 0.781" head diameter, and 7/32" hex drive size, all manufactured to industrial-grade precision.
