S-91440A546 1/4"-20 x 1 1/2" ASME B18.6.3 Steel Round Head Combination Phillips/Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• High tensile strength of 60,000 psi ensures reliable performance under heavy loads and vibration
• Dual Phillips/slotted drive options provide installation flexibility with standard tools
• Class 2A thread fit guarantees consistent engagement and secure fastening
• Rockwell B70 hardness rating maintains thread integrity and prevents stripping
• Fully threaded design offers maximum grip length and holding power
• Rounded head profile reduces surface damage and provides smooth finished appearance

Professional Applications & Engineering Value

This zinc-plated steel round head screw delivers exceptional performance in industrial settings where corrosion resistance and high tensile strength are critical. The 1/4-20 UNC coarse threading provides rapid installation and superior holding power in various materials, while the dual Phillips/slotted drive system accommodates different tool preferences without compromising torque transmission. Engineered to withstand vibration and heavy loads, these fully threaded screws are ideal for machinery assembly, electrical enclosures, structural frameworks, and maintenance applications where reliable fastening solutions are essential for operational safety and longevity.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threading specifications. Complies with ASME B18.6.3 manufacturing standards ensuring consistent quality and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, making these screws suitable for regulated industries and international markets.