S-95345A108 1/4"-20 x 3/8" 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 corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
- Enhanced vibration resistance through the integrated 410 stainless steel internal-tooth lock washer, preventing loosening under dynamic loads.
- High tensile strength of 70,000 psi ensures reliable holding power and durability in demanding applications.
- Easy installation and removal with Phillips No. 3 drive and standard pan head design for efficient assembly.
- Precise thread engagement thanks to UNC coarse threads and Class 2A fit, providing consistent performance.
- Full threading along the 3/8" length maximizes grip and load distribution across the entire fastener.
- Compliance with industry standards including ASME B18.13, RoHS 3, and REACH for quality assurance and environmental safety.
Professional Applications & Engineering Value
This Phillips pan head screw with internal-tooth lock washer is engineered to address common industrial challenges such as vibration-induced loosening and corrosion in machinery, automotive, and electrical assemblies. The combination of 18-8 stainless steel and a passivated finish provides excellent resistance to rust and chemicals, extending service life in humid or corrosive settings. The internal-tooth lock washer, made from 410 stainless steel, bites into surfaces to maintain clamp load, making it ideal for equipment subject to constant motion or shock. With UNC coarse threads and a Class 2A thread fit, it ensures quick, secure fastening without cross-threading, reducing installation time and improving reliability in high-stress applications.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 2A fit for precise dimensional accuracy, fully threaded along a 3/8" length. It meets ASME B18.13 specifications for consistency and performance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various industrial uses.
