S-90087A841 4-40 x 5/16" 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 pre-tapping, reducing assembly time and labor costs.
- Enhanced corrosion resistance with zinc-plated steel construction, ensuring long-term durability in industrial environments.
- Reliable fastening with coarse UNC threading providing excellent grip and vibration resistance in softer materials.
- Easy installation with Phillips No. 1 drive and standard pan head design, allowing for efficient driving with common tools.
- Optimized for use with No. 41 drill bit (0.096" diameter), ensuring precise hole preparation and secure thread engagement.
- Fully threaded blunt tip design for consistent holding power along the entire 5/16" length, minimizing loosening.
- Compliance with ASME B18.6.3 and SAE J933 standards, guaranteeing consistent quality, dimensional accuracy, and interchangeability.
Professional Applications & Engineering Value
These 4-40 UNC thread cutting screws are engineered to solve common fastening challenges in metalworking and assembly. The zinc-plated steel material offers excellent strength and corrosion protection, ideal for harsh conditions. The Type F thread cutting design and coarse UNC thread form enable self-tapping in aluminum, brass, cast iron, and sheet metal, eliminating the need for separate tapping operations and reducing production steps. The Phillips No. 1 drive and pan head ensure secure tool engagement, minimizing cam-out during high-torque applications. This combination delivers reliable, vibration-resistant connections in automotive, machinery, and electronic enclosures, enhancing assembly line efficiency and product longevity.
Specification Summary & Compliance
This product adheres to Class 2A thread tolerances for inch-series UNC coarse threads, with a thread size of 4-40 and length of 5/16". It meets ASME B18.6.3 and SAE J933 specifications, ensuring dimensional consistency and performance reliability. The manufacturing process follows industry standards for thread cutting screws Type F, with full threading and blunt tip. Compliant with RoHS and REACH environmental regulations, these screws are suitable for global industrial use.
