S-92785A557 5/16"-24 x 1" 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 vibration resistance through fine UNF threading, ensuring secure fastening in high-stress applications
- Enhanced holding power with a 90° cone point that penetrates deeply into mating surfaces for reliable torque transmission
- Excellent corrosion resistance provided by 18-8 stainless steel construction, ideal for harsh industrial environments
- High-strength durability with Rockwell B80 hardness, maintaining structural integrity under repeated loads
- Effortless installation and removal using the 5/32" hex drive, reducing assembly time and tool wear
- Precise thread engagement with Class 3A fit, delivering consistent clamping force and alignment accuracy
- Headless design allowing flush mounting in space-constrained assemblies without protruding components
Professional Applications & Engineering Value
Engineered for demanding industrial applications, these 5/16"-24 UNF Class 3A set screws provide critical solutions for machinery, automotive, and precision equipment assembly. The 18-8 stainless steel composition ensures reliable performance in corrosive environments, while the fine thread configuration significantly reduces loosening under vibration—a common failure point in rotating components. The 90° cone point creates positive mechanical locking by embedding into shaft surfaces, preventing axial movement more effectively than standard cup points. Combined with the hex drive design, these headless screws enable high-torque installation in confined spaces where socket access is limited, making them ideal for permanent positioning applications requiring maximum security.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision dimensional control. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features right-hand UNF fine threads with 0.313" diameter and 1" length. The Rockwell B80 hardness ensures consistent mechanical properties across production batches.
