S-90585A569 1/4"-28 x 1" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 316 stainless steel construction with passivated finish, ideal for harsh industrial environments
- Precise Class 3A thread fit ensures secure fastening and vibration resistance in critical applications
- High tensile strength (70,000 psi) provides reliable performance under heavy mechanical loads
- 82° countersink angle allows for flush mounting and streamlined surface profiles
- Hex drive design (5/32") enables efficient installation with standard tools while preventing cam-out
- Full threading along 1" length offers maximum engagement and adjustment flexibility
- Compliance with ASME B18.3 and environmental regulations guarantees quality and safety standards
Professional Applications & Engineering Value
This 316 stainless steel flat head screw with 1/4"-28 UNF fine threading addresses critical challenges in precision engineering and industrial maintenance. The combination of Class 3A thread fit and passivated finish ensures reliable performance in corrosive environments where vibration resistance and long-term durability are paramount. The 82° countersink angle and flat head profile create seamless surface integration for applications requiring aerodynamic efficiency or hygiene standards. Commonly specified in aerospace components, marine hardware, and chemical processing equipment, these hex drive screws provide engineers with a compliant fastening solution that maintains structural integrity while meeting stringent ASME B18.3 specifications for dimensional accuracy.
Specification Summary & Compliance
Manufactured to precise Class 3A thread fit tolerances with UNF fine threading (1/4"-28), this fully threaded screw maintains dimensional compliance with ASME B18.3 standards. The component meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets. With consistent 70,000 psi tensile strength and Rockwell B55 hardness, the fastener delivers reliable mechanical performance while the passivated surface treatment enhances corrosion resistance in demanding applications.
