S-91253A223 8-36 x 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi ensures reliable performance under high-stress conditions, reducing the risk of fastener failure in demanding applications.
• Precision Class 3A thread fit provides superior engagement and vibration resistance, maintaining secure fastening in machinery and equipment.
• Black-oxide coating on alloy steel offers enhanced corrosion resistance and a durable, non-reflective finish suitable for industrial environments.
• Fully threaded design with fine UNF threads allows for maximum grip and uniform load distribution along the entire length.
• 82° countersink angle and flat head profile enable flush mounting, minimizing protrusion and improving safety in assembled components.
• Hex drive (3/32") facilitates easy installation and removal with standard tools, reducing assembly time and labor costs.
• Compliance with ASTM F835, RoHS 3, and REACH ensures adherence to industry standards for safety, environmental responsibility, and material quality.

Professional Applications & Engineering Value

Engineered for high-performance industrial applications, these 8-36 UNF flat head screws address critical needs in machinery, automotive, and aerospace sectors where vibration resistance and precise fit are paramount. The black-oxide alloy steel construction combats corrosion and wear, extending service life in harsh conditions. With a fine thread and Class 3A fit, they provide superior clamping force and reduce loosening under dynamic loads. The fully threaded design ensures consistent holding power, while the 82° countersink allows seamless integration into surfaces, preventing snagging and enhancing aesthetic appeal. Ideal for high-tensile strength requirements, these screws deliver reliability in assemblies demanding exacting tolerances and durability.

Specification Summary & Compliance

This screw features a Class 3A thread fit with UNF fine threads (8-36 size) and right-hand threading, ensuring high precision and interchangeability. Dimensions include a 3/4" length, 0.359" head diameter, and 3/32" 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, confirming adherence to environmental and safety standards without restricted substances.