S-97763A345 1/4"-20 x 5/16" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Exceptional corrosion resistance with black-oxide coated 18-8 stainless steel, ideal for harsh industrial environments
- Superior torque transmission via 5/32" hex drive, preventing stripping and ensuring secure fastening
- High load-bearing capacity with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Precise thread engagement with Class 3A thread fit and UNC coarse threads, reducing cross-threading risks
- Streamlined installation thanks to the rounded button head design and fully threaded right-hand configuration
- Long-term reliability backed by compliance with ASME B18.3, RoHS 3, and REACH regulations
- Versatile compatibility with 1/4"-20 UNC coarse threading, suitable for various industrial assemblies
Professional Applications & Engineering Value
Engineered for industrial-grade performance, these black-oxide 18-8 stainless steel rounded head screws address critical challenges in machinery, automotive, and electronics assembly. The hex drive design ensures maximum torque application without slippage, while the fully threaded UNC coarse pattern facilitates quick alignment and reduces installation time. The Class 3A thread fit guarantees tight tolerances, minimizing vibration-induced loosening in high-stress environments. With a 70,000 psi tensile strength, they provide reliable fastening in structural applications where durability and corrosion resistance are paramount. The button head profile offers a low-profile finish, making them ideal for spaces with clearance constraints.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A thread fit for precise dimensional accuracy. It complies with ASME B18.3 manufacturing standards, ensuring consistent quality and interchangeability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for global industrial use.
