S-90086A610 4-40 x 5/8" ASME B18.6.3, SAE J933 Tapping Screws
Tapping 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 thread cutting performance in aluminum, brass, cast iron, and sheet metal without requiring pre-tapped holes
- Enhanced corrosion resistance with zinc-plated steel construction for extended service life in industrial environments
- Maximum material engagement through fully threaded design ensuring superior holding power and vibration resistance
- Efficient installation with Phillips No. 1 drive and standard flat head design for flush mounting and streamlined assembly
- Reliable coarse threading with UNC 4-40 specification providing excellent pull-out strength in various materials
- Industry-standard compliance meeting ASME B18.6.3 specifications for consistent quality and performance
- Environmental compliance with RoHS 3 regulations ensuring safe use in regulated applications
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel tapping screws deliver exceptional engineering value through their specialized thread cutting Type F design, which eliminates the need for separate tapping operations in aluminum, brass, cast iron, and sheet metal applications. The coarse thread configuration provides superior holding power in softer materials while reducing installation torque requirements. The zinc-plated surface treatment offers reliable corrosion protection in demanding industrial environments, extending fastener lifespan and reducing maintenance costs. The combination of Phillips drive system and standard flat head profile ensures efficient installation and flush mounting in assembly lines, making these screws ideal for high-volume manufacturing operations where reliability and speed are critical.
Specification Summary & Compliance
These tapping screws feature 4-40 UNC coarse threads with standard Class 2A tolerance, fully threaded design, and are manufactured to meet ASME B18.6.3 specifications (SAE J933). The screws are designed for use with No. 41 drill bit (0.096" diameter) and feature an 82° countersink angle for proper seating. Compliance with RoHS 3 (2015/863/EU) ensures environmental responsibility, while the thread cutting Type F design provides reliable performance in various metal applications without requiring pre-tapped holes.
