S-92991A113 2-56 x 1/4" ASME B18.3 Set Screws
Set 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 brass construction for long-lasting performance in harsh industrial environments
- Precise Class 3A thread fit ensures secure fastening with minimal vibration loosening in critical applications
- Enhanced torque transmission through .035" hex drive design for reliable installation and removal
- Optimized holding power with cup tip design that creates consistent pressure points on mating surfaces
- Rockwell B55 hardness rating provides excellent durability while maintaining necessary malleability
- Right-hand coarse UNC threads deliver quick assembly and disassembly in time-sensitive operations
- Headless configuration allows for flush mounting in space-constrained applications
Professional Applications & Engineering Value
This brass set screw delivers exceptional engineering value across multiple industrial sectors where corrosion resistance and precision threading are paramount. The 2-56 UNC coarse thread configuration with Class 3A fit provides superior vibration resistance in machinery, electrical enclosures, and precision instruments. The cup tip design creates concentrated contact pressure, preventing component slippage in pulley systems, gear assemblies, and coupling applications. Manufactured from durable brass material with Rockwell B55 hardness, this fastener maintains structural integrity while offering the corrosion-resistant properties essential for marine, plumbing, and electrical applications where moisture exposure is common. The headless configuration with .035" hex drive enables installation in confined spaces without compromising torque capability.
Specification Summary & Compliance
This precision set screw features 2-56 UNC coarse threads with Class 3A thread fit (tight tolerance for high-vibration applications), 1/4" length, and .035" hex drive. Manufactured in compliance with ASME B18.3 standards for dimensional accuracy and performance. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting international environmental regulations for hazardous substances.
