S-90585A018 5-40 x 3/8" ASME B18.3, ASTM F879 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 with 316 stainless steel and passivated finish, ideal for harsh chemical and marine environments.
- High tensile strength of 70,000 psi ensures reliable fastening under significant mechanical stress.
- Precise Class 3A thread fit provides secure, vibration-resistant connections in industrial assemblies.
- Flat head with hex drive design allows for flush mounting and easy installation with standard tools.
- Full threading and coarse UNC thread enables quick engagement and strong holding power in various materials.
- Compliance with ASME B18.3 standards guarantees consistent quality and dimensional accuracy.
- RoHS 3 and REACH compliant for safe use in regulated industries and environmentally sensitive applications.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 316 stainless steel flat head screws excel in applications where corrosion resistance and mechanical integrity are critical. The passivated finish enhances durability against oxidants and chlorides, making them suitable for chemical processing, marine equipment, and food machinery. The hex drive and flat head profile ensure easy, low-profile installation in countersunk holes, reducing assembly time and improving aesthetics. With a coarse UNC thread and Class 3A fit, these screws provide rapid, secure fastening in metals and plastics, minimizing loosening from vibrations. Ideal for OEM and MRO uses, they deliver long-term reliability in harsh conditions, supported by high tensile strength and compliance with international standards.
Specification Summary & Compliance
This screw features a 5-40 UNC thread size with Class 3A thread fit for precise tolerance, ensuring consistent performance. Dimensions include a 3/8" length, 0.281" head diameter, and 82° countersink angle, adhering to ASME B18.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material restrictions are met.
