S-97763A356 1/4"-28 x 1" 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
- Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh industrial environments
- Exceptional tensile strength rated at 70,000 psi for reliable performance under heavy loads
- Precise Class 3A thread fit ensures secure fastening with minimal backlash in critical assemblies
- Optimized hex drive design (5/32") provides excellent torque transmission and reduced cam-out risk
- Full threading along 1" length delivers maximum grip and uniform stress distribution
- Hardened Rockwell B55 construction maintains thread integrity through repeated installations
- Compliant with major industry standards including ASME B18.3 for guaranteed dimensional accuracy
Professional Applications & Engineering Value
These Black-Oxide 18-8 Stainless Steel rounded head screws solve critical challenges in precision engineering applications where corrosion resistance and high tensile strength are paramount. The Class 3A UNF fine threads provide superior resistance to vibration loosening in machinery, automotive, and aerospace assemblies. The combination of 70,000 psi tensile strength and Rockwell B55 hardness ensures reliable performance in high-stress environments while the Black-Oxide surface treatment enhances durability without compromising the stainless steel's inherent corrosion resistance. The fully threaded design maximizes engagement in both thick and thin materials, making these hex drive screws versatile across various industrial fastening scenarios.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with precise Class 3A thread tolerances for UNF 1/4"-28 fine threading. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Right-hand threaded with standard rounded button head profile, 0.437" head diameter, and 1" fully threaded length. Meets all dimensional and material requirements for industrial-grade stainless steel fasteners.
