S-91375A576 5/16"-18 x 3/8" ASME B18.3, ASTM F912 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 black-oxide coating, extending service life in harsh industrial environments
- Exceptional thread engagement with Class 3A precision fit for reliable, vibration-resistant fastening
- High-strength performance backed by Rockwell C45 hardness for demanding mechanical applications
- Optimized installation efficiency through 5/32" hex drive design requiring minimal clearance
- Secure component positioning with cup tip design that prevents slippage on shaft surfaces
- Industry-standard compatibility with UNC coarse threads ensuring broad interchangeability
- Regulatory compliance assurance meeting ASME B18.3, ASTM F912, RoHS 3 and REACH standards
Professional Applications & Engineering Value
This black-oxide alloy steel set screw delivers critical engineering advantages for industrial assembly challenges. The Class 3A thread fit provides superior clamping force retention in high-vibration environments, while the UNC coarse threading enables rapid installation in production settings. The headless hex drive design allows flush mounting in confined spaces, making it ideal for precision machinery, motor assemblies, and rotating equipment where protrusions are unacceptable. The cup tip configuration creates positive engagement with shaft surfaces, preventing component drift in power transmission systems. Combined with Rockwell C45 hardness, this fastener maintains dimensional stability under heavy mechanical loads, solving common failure points in industrial equipment.
Specification Summary & Compliance
Manufactured to exacting Class 3A thread tolerances per UNC standards with 5/16"-18 thread size and coarse thread spacing. Complies with ASME B18.3 dimensional specifications and ASTM F912 material requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use. Features precise 3/8" length and 0.313" thread diameter for consistent performance across applications.
