S-91241A113 4-40 x 1" 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 for extended service life in harsh environments.
- Reliable vibration resistance provided by the integrated 410 stainless steel spring lock washer, preventing loosening under dynamic loads.
- High-strength performance with 70,000 psi tensile strength and Rockwell B80 hardness for demanding mechanical fastening applications.
- Effortless installation using the Phillips #1 drive and standard pan head design, compatible with common tools and reducing assembly time.
- Precise thread engagement with Class 2A fit and UNC coarse threads ensuring consistent, secure fastening and easy alignment.
- Full-threaded design for maximum grip along the entire 1" length, enhancing load distribution and joint integrity.
- Regulatory compliance assurance meeting ASME B18.13 standards, RoHS 3, and REACH for safe, reliable use in regulated industries.
Professional Applications & Engineering Value
This 4-40 UNC rounded head Phillips screw with an integrated spring lock washer is engineered to address critical challenges in industrial assembly, such as vibration-induced loosening and corrosion. The 18-8 stainless steel material, enhanced by a passivated finish, provides excellent resistance to rust and chemical exposure, making it ideal for machinery, electronics, and outdoor equipment. The coarse thread design and Class 2A thread fit ensure quick, accurate installation with minimal cross-threading risk, while the fully threaded shank maximizes holding power in thin materials. Combined with the 410 stainless steel washer, this screw delivers reliable performance in high-stress applications, reducing maintenance needs and improving operational safety.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 2A dimensional accuracy and is fully threaded over a 1" length. It complies with ASME B18.13 manufacturing specifications and is verified as RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety standards for industrial use.
