S-90400A228 1/4"-20 x 1 1/2" 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 vibration resistance with integrated spring lock washer, preventing loosening under dynamic loads
- Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
- High-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Quick installation using standard Phillips No. 3 drive and coarse UNC threading for efficient assembly
- Reliable thread engagement with Class 2A fit and full threading ensuring secure fastening
- Optimized load distribution through pan head design with 0.492" diameter and integrated washer
- Industry compliance meeting ASME B18.13 standards for consistent quality and performance
Professional Applications & Engineering Value
This zinc-plated steel Phillips pan head screw with spring lock washer addresses critical industrial challenges where vibration-induced loosening compromises assembly integrity. The combination of 60,000 psi tensile strength and Rockwell B70 hardness ensures reliable performance in heavy-duty applications, while the coarse UNC threading with Class 2A fit provides rapid installation without sacrificing holding power. The integrated spring lock washer creates constant tension that maintains clamp force under cyclic loading, making these 1/4"-20 screws ideal for machinery, equipment manufacturing, and automotive applications where vibration resistance is paramount. The zinc-plated steel construction offers essential corrosion protection for extended service life in demanding environments.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC coarse threading (1/4"-20). Fully compliant with ASME B18.13 specifications for dimensional accuracy and performance. Meets environmental regulations including RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards. Features include 1-1/2" length, fully threaded design, and integrated spring lock washer with 0.508" OD for optimal fastening performance.
