S-90275A535 1/4"-20 x 3/8" ASME B18.6.3 Steel Slotted Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Exceptional 60,000 psi tensile strength ensures reliable fastening under high-stress industrial applications
• Precision Class 2A thread fit provides consistent engagement and reduces cross-threading risks
• 82° undercut flat head design offers flush mounting and improved load distribution
• Fully threaded coarse UNC pattern delivers faster installation and superior holding power
• Rockwell B70 hardness rating maintains thread integrity through repeated use
• Comprehensive regulatory compliance meets ASME B18.6.3, RoHS 3, and REACH standards

Professional Applications & Engineering Value

These 1/4-20 UNC flat head screws deliver critical engineering solutions where flush surface mounting and high tensile strength are paramount. The zinc-plated steel construction provides essential corrosion protection for machinery, electrical enclosures, and automotive assemblies exposed to industrial environments. The undercut flat head profile with 82° countersink angle ensures secure, vibration-resistant seating while the coarse thread design enables rapid installation in production settings. Engineered to ASME B18.6.3 specifications, these fully threaded screws maintain consistent Class 2A thread fit tolerance for reliable performance in high-volume manufacturing and maintenance applications.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerance per UNC standards. Complies with ASME B18.6.3 mechanical specifications, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) chemical regulations. Features include 1/4"-20 thread size, 3/8" length, right-hand thread direction, and slotted drive style.