S-91781A638 3/8"-16 x 3 1/2" ASME B18.6.3 Stainless Steel Slotted Flat Head Screws
Stainless Steel Slotted 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 18-8 Stainless Steel construction and passivated finish, ideal for harsh industrial environments
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
- Precise Class 2A thread fit guarantees smooth installation and secure fastening in UNC coarse thread applications
- Standard 82° countersink angle provides flush mounting for clean, professional finishes
- Rockwell B80 hardness delivers excellent durability and resistance to wear
- Partial threading design allows for optimal grip in specific material thicknesses
- Full compliance with ASME B18.6.3 ensures dimensional accuracy and interchangeability
Professional Applications & Engineering Value
These 3/8"-16 UNC flat head screws deliver exceptional engineering value in demanding applications where corrosion resistance and structural integrity are paramount. The 18-8 Stainless Steel composition combined with passivated surface treatment provides superior protection against chemical exposure and environmental factors, making them ideal for marine equipment, food processing machinery, and outdoor structures. The coarse UNC threading ensures rapid installation and reliable performance in softer materials or where vibration resistance is critical. With partial threading and standardized 82° countersink angle, these screws offer precise flush mounting in machinery assemblies, electronic enclosures, and structural frameworks where both aesthetic finish and mechanical performance matter.
Specification Summary & Compliance
This flat head screw features Class 2A thread fit tolerance with UNC coarse threading (3/8"-16) in right-hand direction, manufactured to ASME B18.6.3 specifications for dimensional accuracy. The product is RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant, meeting international environmental and safety standards for industrial components.
