S-91253A652 3/8"-16 x 6" ASTM F835 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength (130,000 psi) for reliable performance in high-stress industrial environments
• Superior corrosion resistance provided by black-oxide coating on alloy steel, extending service life
• Precise Class 3A thread fit ensures secure fastening with minimal risk of loosening under vibration
• 82° countersink angle allows for flush mounting in standard applications, improving aesthetics and safety
• Hex drive design (7/32") enables high-torque installation with common tools, reducing assembly time
• Partial threading provides optimal grip strength while allowing for material expansion/contraction
• Comprehensive compliance with ASTM F835, RoHS 3, and REACH ensures regulatory acceptance

Professional Applications & Engineering Value

These 3/8"-16 UNC flat head screws deliver critical engineering solutions where high tensile strength and corrosion resistance are paramount. The black-oxide alloy steel construction withstands demanding conditions in machinery, structural frameworks, and heavy equipment assembly. The coarse UNC threading with Class 3A precision provides superior engagement in various materials, reducing stripping risks while the 82° countersink creates seamless surface finishes. Partially threaded design offers controlled clamping force distribution, making these industrial fasteners ideal for applications requiring both secure fastening and material flexibility.

Specification Summary & Compliance

Manufactured to exacting standards with Class 3A thread fit and UNC coarse thread spacing (3/8"-16). The 6" length with minimum 1 1/4" thread length ensures consistent performance. Full compliance with ASTM F835 specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) chemical safety regulations. Heat treated to Rockwell C39 hardness for optimal durability in industrial applications.