S-91309A542 1/4"-20 x 1" ASME B18.2.1, ASTM A307 Low-Strength Steel Hex Head Screws
Low-Strength Steel Hex Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Exceptional corrosion resistance with zinc plating for extended service life in demanding environments
- High tensile strength of 60,000 psi ensures reliable, failure-resistant fastening for critical applications
- Rockwell B69 hardness provides superior resistance to wear and deformation under load
- Coarse UNC threading enables faster installation and reduced cross-threading risk compared to fine threads
- Full threading along the 1" length offers maximum grip and adjustment flexibility in various material thicknesses
- External hex drive design allows for high-torque application with standard tools and easy maintenance access
- Comprehensive regulatory compliance including RoHS 3 and REACH ensures environmental and safety standards are met
Professional Applications & Engineering Value
Engineered for industrial fastening applications requiring dependable performance, these zinc plated steel hex head screws solve common challenges in machinery assembly, structural frameworks, and equipment maintenance. The UNC coarse thread configuration provides excellent engagement in softer materials and faster installation times, while the Class 2A thread fit maintains precise tolerances for consistent clamping force. The combination of 60,000 psi tensile strength and Rockwell B69 hardness ensures these fasteners withstand vibration, shock loads, and long-term stress without compromising joint integrity. The zinc plating delivers crucial corrosion protection in environments exposed to moisture, chemicals, or outdoor conditions, significantly extending maintenance intervals and reducing lifecycle costs.
Specification Summary & Compliance
This 1/4"-20 x 1" hex head screw features UNC coarse threads with Class 2A tolerance for consistent fit and performance. Manufactured to ASME B18.2.1 specifications with material meeting ASTM A307 requirements. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors.
