S-91253A001 10-32 x 3/8" ASME B18.3 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength of 130,000 psi provides reliable performance in high-stress applications, reducing the risk of fastener failure.
• Precision Class 3A thread fit ensures tight, secure connections with minimal backlash for vibration-resistant assemblies.
• Black-oxide coating on alloy steel offers superior corrosion resistance and a durable, non-reflective finish for harsh environments.
• 82° countersink angle with flat head design allows for flush mounting, creating smooth surfaces and preventing snagging.
• Hex drive compatibility enables high-torque installation with standard tools, speeding up assembly and reducing labor time.
• Fully threaded UNF fine thread maximizes grip length and load distribution, enhancing joint integrity in thin materials.
• Compliance with ASME B18.3 and ASTM F835 guarantees consistent quality and interchangeability in regulated industries.

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 10-32 UNF flat head screws address critical challenges in machinery, electronics, and automotive assemblies. The black-oxide alloy steel construction resists rust and wear, extending service life in corrosive or high-moisture settings. With a fine thread and Class 3A fit, the screw maintains precise alignment and clamping force, preventing loosening under dynamic loads. The hex drive and 82° countersink facilitate quick, flush installations in confined spaces, reducing assembly errors and improving aesthetic outcomes. Ideal for securing panels, brackets, and components, these screws deliver high-strength fastening that meets rigorous engineering standards while supporting efficient production workflows.

Specification Summary & Compliance

This flat head screw features a 10-32 UNF thread with Class 3A tolerance for precise fit, a 3/8" length, and fully threaded design. It conforms to ASME B18.3 and ASTM F835 specifications, ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, adhering to environmental and safety regulations for global industrial use.