S-95345A019 2-56 x 5/8" ASME B18.13 Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer
Stainless Steel Pan Head Phillips Screws with Internal-Tooth 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 410 stainless steel internal-tooth lock washer, preventing loosening in high-stress applications
- Exceptional corrosion resistance through 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- High tensile strength rating of 70,000 psi ensures reliable performance under heavy mechanical loads
- Precision Class 2A thread fit with UNC coarse threading for easier assembly and consistent engagement
- Phillips drive compatibility with No. 1 drive size provides familiar, efficient installation across various applications
- Full threading along 5/8" length maximizes grip strength and distribution across the entire fastener
- Comprehensive compliance with ASME B18.13, RoHS 3, and REACH standards ensures quality and environmental responsibility
Professional Applications & Engineering Value
Engineered for demanding industrial environments, these 2-56 UNC rounded head Phillips screws with internal-tooth lock washers provide critical vibration resistance in machinery, electronics, and automotive assemblies where constant motion typically causes fastener failure. The 18-8 stainless steel core with passivated finish combats corrosion from chemicals, moisture, and temperature fluctuations, extending service life in harsh conditions. The coarse UNC threading and Class 2A fit ensure rapid, secure installation while maintaining alignment precision. Combined with 70,000 psi tensile strength, this fastener solves common issues of joint integrity loss, material degradation, and maintenance frequency in continuous-operation equipment.
Specification Summary & Compliance
This rounded head screw maintains Class 2A thread fit per UNC standards with 2-56 coarse threading and 5/8" fully threaded length. Manufacturing complies with ASME B18.13 specifications for dimensional accuracy and performance. The assembly meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming absence of restricted substances. Both screw and internal-tooth lock washer utilize passivated stainless steel (18-8 and 410 grades respectively) for consistent material properties and corrosion resistance.
