S-90344A138 6-32 x 1 1/4" ASTM A574 Socket Head Screws with Flat Washer

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide finish, ideal for harsh industrial environments
• Exceptional tensile strength of 170,000 psi ensures reliable performance under extreme loads
• Precise Class 3A thread fit provides superior engagement and vibration resistance
• Integrated flat washer distributes load evenly and prevents surface damage
• High hardness rating (Rockwell C39) maintains thread integrity and extends service life
• Partially threaded design allows for optimal clamping force control in assembly applications
• Standard hex drive compatibility with 7/64" key for efficient installation and removal

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these black-oxide alloy steel socket head cap screws combine material strength with precision manufacturing to solve critical fastening challenges. The 6-32 UNC coarse thread configuration ensures rapid assembly while maintaining Class 3A fit tolerances for secure connections in vibration-prone environments. The integrated flat washer prevents surface marring and distributes clamping forces effectively, making these screws ideal for machinery assembly, automotive components, and heavy equipment where corrosion resistance and high tensile strength are paramount. The partially threaded design provides controlled clamping in precision applications while the standardized hex drive ensures compatibility with common tooling.

Specification Summary & Compliance

Manufactured to ASTM A574 specifications with Class 3A thread fit precision and UNC coarse thread standards. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include: 1-1/4" length, 3/4" minimum thread length, 3/8" washer OD, and right-hand thread orientation.