S-91253A841 3/4"-10 x 1 3/4" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (130,000 PSI) for reliable performance in demanding applications
• Superior corrosion resistance provided by the black-oxide finish on alloy steel
• Precise Class 3A thread fit ensures secure, vibration-resistant connections
• 82° countersink angle allows for flush mounting in standard applications
• Fully threaded design delivers maximum grip length and holding power
• Heavy-duty hex drive (1/2") enables high-torque installation without stripping
• Rockwell C37 hardness maintains structural integrity under repeated stress

Professional Applications & Engineering Value

These 3/4"-10 UNC flat head screws with black-oxide alloy steel construction address critical industrial fastening challenges. The coarse thread design provides superior pull-out resistance in soft materials and faster installation times. The fully threaded configuration ensures consistent clamping force across the entire engagement length, preventing joint loosening in high-vibration environments. With their 82° countersink angle and hex drive system, these screws deliver reliable performance in machinery assembly, structural steel connections, and heavy equipment manufacturing where flush mounting and high torque requirements are essential.

Specification Summary & Compliance

Manufactured to exacting Class 3A thread fit tolerances with UNC coarse threading (3/4"-10). Complies with ASTM F835 specifications for mechanical properties and dimensional requirements. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. Features right-hand thread direction and standard flat head profile for universal industrial compatibility.