S-91255A024 10-32 x 1/8" ASTM F835 Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from the black-oxide finish, ideal for harsh industrial environments.
• Exceptional tensile strength (120,000 psi) and hardness (Rockwell C39) for reliable, high-load fastening.
• Precision Class 3A thread fit ensures tight, secure connections with minimal backlash.
• Fully threaded UNF fine thread design provides maximum grip and engagement in tapped holes.
• Convenient 1/8" hex drive allows for easy installation and removal with standard tools.
• Low-profile rounded (button) head offers a smooth, finished appearance and reduces snagging.
• Compliance with major industry standards (ASME B18.3, ASTM F835, RoHS 3, REACH) guarantees quality and safety.

Professional Applications & Engineering Value

This 10-32 UNF Class 3A black-oxide alloy steel rounded head screw is engineered for precision assemblies where failure is not an option. The combination of a fine thread spacing and Class 3A fit provides superior vibration resistance and prevents loosening in dynamic applications, from aerospace components to sensitive electronic enclosures. The fully threaded design ensures consistent clamping force along the entire 1/8" length, while the black-oxide surface treatment significantly enhances durability against corrosion, extending service life. The button head with a 1/8" hex drive is ideal for applications with limited clearance, offering a secure, flush finish that meets the demands of high-performance industrial fastening.

Specification Summary & Compliance

This screw features a 10-32 UNF thread with a precision Class 3A fit and fine thread spacing. It is manufactured from alloy steel to meet ASME B18.3 and ASTM F835 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various global markets.