S-97972A119 1/4"-20 x 1 1/2" Extreme-Strength Steel Flanged Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in harsh environments
• Exceptional tensile strength rated at 180,000 psi for reliable performance in high-stress applications
• Enhanced driving stability with external hex drive and 5/16" head width for secure tool engagement
• Integrated flange design eliminates need for separate washers while providing superior load distribution
• Precision Class 2A thread fit ensures consistent engagement and reduces cross-threading risks
• Optimized partial threading allows for precise clamp force control in assembly operations
• Rockwell C38 hardness maintains structural integrity under repeated torque applications

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these black-oxide steel hex head screws deliver exceptional performance where corrosion resistance and high tensile strength are critical. The UNC coarse thread design with Class 2A fit provides reliable fastening in machinery assembly, automotive components, and structural frameworks. The integrated flange (33/64" diameter) distributes clamping force effectively, preventing surface damage while eliminating the need for additional washers. The partial threading allows for precise joint compression control, making these industrial fasteners ideal for applications requiring specific grip lengths. The external hex drive ensures positive tool engagement for efficient installation in confined spaces common in manufacturing and maintenance operations.

Specification Summary & Compliance

Manufactured to exacting standards with Class 2A thread fit tolerance per UNC specifications, ensuring consistent threading performance. The 1/4"-20 coarse thread configuration meets standard inch system requirements with 1" minimum thread length and 1-1/2" overall length. Complies with industry standards for black-oxide steel fasteners, featuring Rockwell C38 hardness and 180,000 psi tensile strength ratings suitable for heavy-duty applications. Material composition and surface treatment comply with industrial fastener specifications for consistent performance in commercial and industrial environments.