S-96640A157 1/4"-20 x 1 1/4" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips 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
- Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
- Class 2A thread fit provides smooth assembly and consistent engagement in UNC coarse threaded applications
- 82° countersink angle allows for flush mounting and reduced protrusion in precision assemblies
- Fully threaded design maximizes grip length and load distribution across the entire fastener
- Phillips No. 3 drive offers secure tool engagement and efficient installation with standard drivers
- Rockwell B80 hardness maintains structural integrity and resistance to deformation during tightening
Professional Applications & Engineering Value
These 1/4"-20 UNC flat head Phillips screws deliver exceptional engineering value in demanding applications where corrosion resistance, strength, and precise flush mounting are critical. The Black-Oxide 18-8 Stainless Steel construction provides enhanced protection against oxidation and chemical exposure, making them suitable for outdoor equipment, marine hardware, and food processing machinery. The fully threaded design with coarse UNC threading ensures rapid installation and superior holding power in soft materials or pre-tapped holes. With their 82° countersink angle and Phillips drive, these screws eliminate surface protrusions while maintaining secure fastening in tight-clearance assemblies, reducing the risk of snagging or component damage in automated systems.
Specification Summary & Compliance
This fastener features 1/4"-20 UNC coarse threads with Class 2A thread fit for standard industrial tolerances. Manufacturing and dimensional compliance adhere to ASME B18.6.3 specifications, ensuring interchangeability and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global supply chains and environmentally sensitive applications.
