S-93791A419 1/4"-20 x 2" ASME B18.3 Stainless Steel Hex Drive Flat Head Screws
Stainless Steel Hex Drive Flat Head 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 18-8 stainless steel and black-oxide passivated finish for long-lasting performance in harsh environments.
- High tensile strength of 70,000 psi ensures reliable load-bearing capacity for demanding industrial applications.
- Precise Class 3A thread fit guarantees secure fastening and vibration resistance in critical assemblies.
- 82° countersink angle and standard flat head profile provide a flush, professional finish while distributing load effectively.
- Coarse UNC threading allows for quick installation and reduced cross-threading risks in various materials.
- Hex drive (5/32") design enables high-torque application with common tools, minimizing slippage and damage.
- Compliance with ASME B18.3, RoHS 3, and REACH ensures adherence to industry standards and environmental safety regulations.
Professional Applications & Engineering Value
This 1/4"-20 x 2" flat head screw is engineered to address common industrial challenges such as corrosion, vibration loosening, and high-stress demands. Made from 18-8 stainless steel with a black-oxide passivated finish, it offers superior protection against rust and chemical exposure, making it ideal for outdoor machinery, marine equipment, and chemical processing plants. The UNC coarse thread and Class 3A fit ensure tight, reliable connections in metals and plastics, reducing maintenance needs. Partially threaded design and 82° countersink angle allow for precise flush mounting in countersunk holes, enhancing structural integrity and aesthetics in automotive, aerospace, and construction applications.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision, a minimum thread length of 1", and dimensions including a head diameter of 0.531" and length of 2". It meets ASME B18.3 specifications for flat head screws, with material hardness of Rockwell B55 and tensile strength of 70,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use.
