S-92210A422 1/4"-28 x 7/16" 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
- Superior corrosion resistance from 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
- Exceptional thread precision and reliability with Class 3A fit and UNF fine threads, ensuring secure, vibration-resistant connections
- High tensile strength of 70,000 psi and Rockwell B55 hardness for dependable performance under heavy loads
- Efficient installation and removal with 5/32" hex drive, reducing assembly time and tool slippage
- Optimal flush seating due to standard 82° countersink angle and flat head design, preventing snagging in precision assemblies
- Full threading along the 7/16" length provides maximum grip and uniform stress distribution in fastened joints
- Compliance with ASME B18.3, RoHS 3, and REACH guarantees quality, safety, and environmental standards are met
Professional Applications & Engineering Value
Engineered for demanding applications, these 1/4"-28 UNF flat head screws address critical challenges in machinery, electronics, and automotive sectors. The 18-8 stainless steel material combined with a passivated finish offers excellent resistance to oxidation and chemicals, reducing maintenance in corrosive settings. With a Class 3A thread fit and fine thread spacing, they deliver precise, tight fastening that minimizes loosening under vibration—common in dynamic equipment. The hex drive and flat head profile enable easy access in confined spaces, while the 82° countersink angle ensures a smooth, flush fit for streamlined assemblies. Ideal for high-strength, corrosion-resistant fastening, these screws enhance durability and reliability in precision engineering projects.
Specification Summary & Compliance
This product features precise dimensions, including a thread size of 1/4"-28 UNF with Class 3A thread fit for tight tolerances, and a length of 7/16". It adheres to ASME B18.3 manufacturing specifications, ensuring consistent quality. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) confirms it is free from hazardous substances, supporting safe and sustainable industrial use.
