S-90400A227 1/4"-20 x 1" ASME B18.13 Steel Pan Head Phillips Screws with Spring Lock Washer
Steel Pan Head Phillips Screws with Spring Lock Washer
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
- Reliable vibration resistance through integrated spring lock washer that maintains clamping force under dynamic loads
- High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Easy installation and removal with Phillips No. 3 drive and standard pan head design for efficient assembly operations
- Precise thread engagement through UNC coarse threads with Class 2A fit ensuring consistent fastening performance
- Full-threaded design provides maximum grip length and load distribution across the entire fastener
- Regulatory compliance meets ASME B18.13 standards while being RoHS 3 and REACH compliant for global industrial use
Professional Applications & Engineering Value
These zinc-plated steel pan head screws with integrated spring lock washers deliver exceptional engineering value in vibration-prone applications. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in machinery, equipment assembly, and structural frameworks where joint integrity is critical. The UNC coarse threads with Class 2A fit provide excellent engagement in various materials while the zinc plating offers corrosion protection for extended service life. The integrated spring lock washer eliminates the need for separate washers, streamlining assembly processes while maintaining secure fastening in high-vibration environments such as automotive components, industrial machinery, and electrical enclosures.
Specification Summary & Compliance
This 1/4"-20 x 1" fully threaded screw features precise Class 2A thread fit with UNC coarse thread spacing and right-hand threading. Manufactured to ASME B18.13 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The spring lock washer (0.508" OD, 0.039" thickness) is integrated with the zinc-plated steel construction, ensuring consistent performance and regulatory adherence for industrial applications worldwide.
