S-91263A550 10-32 x 1 1/2" 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 in high-stress applications, reducing the risk of fastener failure.
• Class 3A thread fit provides superior precision and tighter tolerances for secure, vibration-resistant assemblies in demanding environments.
• Zinc-plated alloy steel construction offers excellent corrosion resistance, extending service life and reducing maintenance needs.
• Partially threaded design with fine UNF threads allows for precise clamping force control and improved grip in thin materials.
• 82° countersink angle and flat head profile enable flush mounting for a clean, professional finish and reduced snag hazards.
• 1/8" hex drive facilitates easy installation and removal with standard tools, speeding up assembly processes.
• Rockwell C39 hardness ensures high durability and wear resistance, maintaining thread integrity over repeated use.

Professional Applications & Engineering Value

These 10-32 UNF flat head screws are engineered to address critical challenges in industrial and mechanical assemblies where precision, strength, and environmental resilience are paramount. The zinc-plated alloy steel material combats corrosion in harsh conditions, while the Class 3A thread fit minimizes backlash and ensures stable connections in vibrating machinery. The fine thread spacing and partial threading provide superior holding power in applications like automotive components, electronic enclosures, and precision equipment, where consistent clamp load and space efficiency are essential. With an 82° countersink, they sit flush to prevent interference, making them ideal for streamlined designs in aerospace, manufacturing, and automation systems.

Specification Summary & Compliance

This screw adheres to Class 3A thread fit per UNF standards, ensuring high precision and interchangeability. It meets ASTM F835 specifications for mechanical properties and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial use without hazardous substances. Dimensions include a length of 1 1/2", thread size of 10-32, and drive size of 1/8", all manufactured to exact inch system tolerances for reliable performance.