S-92949A836 1/4"-20 x 1 3/8" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh environments.
- Exceptional mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, heavy-duty applications.
- Secure and efficient installation enabled by the hex drive design, preventing cam-out and ensuring precise torque application.
- Precise thread engagement with Class 3A UNC coarse threads, providing superior fit and vibration resistance in assemblies.
- Full threading along the 1-3/8" length for maximum grip and load distribution across the entire fastener.
- Rounded (button) head profile that presents a low-profile, finished appearance while reducing snagging risks.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 1/4"-20 x 1-3/8" rounded head screw is engineered to address critical challenges in industrial and mechanical assemblies. The 18-8 stainless steel material, combined with a passivated finish, provides outstanding resistance to corrosion and oxidation, making it suitable for outdoor, marine, and chemical-exposed settings. The hex drive and fully threaded UNC design ensure quick, secure fastening with high clamp force, reducing the risk of loosening under vibration. Its Class 3A thread fit guarantees tight tolerances for precision applications in machinery, automotive, and electronics, where reliability and durability are paramount. This screw delivers consistent performance, minimizing maintenance and replacement costs in demanding B2B environments.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision, a length of 1-3/8", and a rounded (button) head with hex drive. It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring it is free from hazardous substances and suitable for global industrial use.
