S-96640A250 1/4"-20 x 3" 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
- Exceptional tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
- Full UNC coarse threading provides faster installation and superior holding power in various materials
- Standard 82° countersink angle creates a flush, professional finish that eliminates snagging hazards
- Class 2A thread fit guarantees consistent, precise engagement with standard nuts and threaded holes
- Rockwell B80 hardness maintains thread integrity and prevents stripping during repeated use
- Comprehensive compliance with ASME B18.6.3, RoHS 3, and REACH ensures quality and environmental responsibility
Professional Applications & Engineering Value
These black-oxide stainless steel flat head screws deliver critical performance advantages in demanding industrial applications where corrosion resistance and structural integrity are paramount. The combination of 18-8 stainless steel construction with black-oxide coating provides enhanced protection against rust and chemical exposure, making them ideal for machinery, equipment assembly, and outdoor installations. The fully threaded UNC coarse thread design ensures maximum grip strength in both metal and composite materials, while the standard 82° countersink allows for seamless flush mounting in precision applications. With 80,000 psi tensile strength and Rockwell B80 hardness, these Phillips flat head screws maintain their mechanical properties under sustained stress, preventing fastener failure in critical joints and assemblies.
Specification Summary & Compliance
Manufactured to exacting ASME B18.6.3 specifications with Class 2A thread fit tolerances for consistent performance. Features 1/4"-20 UNC coarse threads with standard 82° countersink angle and No. 3 Phillips drive. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industries and applications.
