S-95599A113 4-40 x 3/8" Stainless Steel Oversized-Flange Button Head Hex-Drive Screws
Stainless Steel Oversized-Flange 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 18-8 stainless steel construction, ideal for harsh environments and reducing maintenance costs
- High tensile strength of 80,000 psi ensures reliable, long-lasting fastening under demanding loads
- Integrated flange design eliminates the need for a separate washer, providing a larger bearing surface for secure clamping and simplified assembly
- Hex drive (1/16") allows for high-torque installation with common tools, minimizing slippage and damage
- Coarse UNC threads with Class 2A fit offer quick assembly and excellent vibration resistance in a wide range of materials
- Fully threaded shank maximizes grip length and provides consistent holding power along the entire fastener
- Compliance with RoHS 3 and REACH ensures environmental safety and meets stringent international regulatory standards
Professional Applications & Engineering Value
This 4-40 UNC flanged rounded head screw is engineered to address common industrial fastening challenges. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it a dependable choice for electronics enclosures, machinery panels, and automotive assemblies exposed to moisture or chemicals. The button-style rounded head with its wide profile and integrated flange distributes clamp force effectively, preventing surface damage and maintaining a secure joint even under vibration. The coarse thread and Class 2A fit ensure rapid installation and reliable performance in both metallic and non-metallic substrates, streamlining production and reducing the risk of thread stripping.
Specification Summary & Compliance
This screw conforms to UNC coarse thread standards with a Class 2A thread fit for consistent dimensional accuracy. It is manufactured from 18-8 Stainless Steel with a hardness of Rockwell B85 and a tensile strength of 80,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and meets global environmental standards for industrial components.
