S-91253A149 5-44 x 3/8" 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
- Exceptional tensile strength of 130,000 psi ensures reliable performance in high-stress industrial environments, reducing the risk of fastener failure.
- Precise Class 3A thread fit provides superior engagement and vibration resistance, minimizing loosening in critical assemblies.
- Black-oxide finish on alloy steel offers enhanced corrosion resistance and durability, extending service life in demanding conditions.
- Fully threaded design with fine UNF threads allows for maximum grip and uniform load distribution, improving joint integrity.
- 82° countersink angle and flat head profile enable flush mounting for a clean, aerodynamic finish in precision applications.
- Hex drive (5/64") facilitates easy installation and high torque application, speeding up assembly processes.
- Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to industry standards for safety and environmental responsibility.
Professional Applications & Engineering Value
These 5-44 UNF flat head screws are engineered to address common industrial challenges, such as vibration-induced loosening and corrosion in machinery. Made from black-oxide alloy steel, they combine high Rockwell C39 hardness and 130,000 psi tensile strength to withstand heavy loads and harsh environments. The fine thread spacing and Class 3A thread fit ensure tight, secure fastening in precision equipment like aerospace components, automotive systems, and electronic enclosures. The 82° countersink angle allows for seamless integration into tapered holes, reducing protrusion and enhancing safety. Ideal for applications requiring reliable, fully threaded fasteners with hex drive convenience, these screws deliver long-term performance and reduce maintenance needs.
Specification Summary & Compliance
This screw features a Class 3A thread fit for high precision, adhering to UNF thread standards with a fine thread spacing. Dimensions include a 3/8" length, 0.281" head diameter, and 5/64" hex drive. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability.
