S-91241A111 4-40 x 3/16" ASME B18.13 Stainless Steel Pan Head Phillips Screws with Spring Lock Washer
Stainless 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 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
- Enhanced vibration resistance thanks to the integrated 410 stainless steel spring lock washer, preventing loosening under dynamic loads.
- High tensile strength of 70,000 psi and Rockwell B80 hardness for dependable performance in demanding mechanical assemblies.
- Secure and efficient installation with Phillips No. 1 drive and fully threaded UNC coarse thread design, reducing assembly time.
- Precise Class 2A thread fit ensuring smooth engagement and consistent fastening in industrial applications.
- Durable pan head profile with standard rounded design for easy handling and reduced surface damage during tightening.
- Compliance with ASME B18.13, RoHS 3, and REACH standards, guaranteeing safety and environmental responsibility.
Professional Applications & Engineering Value
This 4-40 UNC rounded head Phillips screw with an integrated spring lock washer is engineered to address common industrial challenges like vibration-induced loosening and corrosion. Made from 18-8 stainless steel and featuring a passivated finish, it resists rust and chemical exposure, making it ideal for machinery, electronics, and outdoor equipment. The coarse thread and fully threaded design ensure quick, secure fastening in materials where fine threads might strip, while the 410 stainless steel washer maintains clamp force under stress. Its 70,000 psi tensile strength and precise Class 2A thread fit provide reliable performance in assemblies requiring repeated disassembly, reducing maintenance costs and downtime.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 2A thread fit for dimensional accuracy, a length of 3/16", and a pan-style rounded head. It meets ASME B18.13 specifications for consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
