S-91385A585 5/16"-18 x 1 1/2" 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 vibration resistance with integrated nylon patch thread locker that prevents loosening under dynamic loads
- Exceptional durability from Rockwell C45 hardened alloy steel construction for extended service life
- Reliable performance across extreme temperatures (-50°F to 250°F) maintaining locking integrity
- Precise Class 3A thread fit ensuring secure fastening with minimal backlash in critical assemblies
- Corrosion-resistant black-oxide finish providing protection in demanding industrial environments
- Space-saving headless design with 5/32" hex drive for installations where clearance is limited
- Cup tip configuration delivering positive gripping action on shaft surfaces
Professional Applications & Engineering Value
This Black-Oxide Alloy Steel Set Screw addresses critical vibration-induced loosening challenges in industrial machinery and precision equipment. The 5/16"-18 UNC coarse threads with Class 3A fit provide exceptional engagement strength while the integrated nylon patch thread locker creates permanent friction that resists rotational forces. The headless design with hex drive allows installation in confined spaces where traditional fasteners cannot be used. Engineered for demanding applications including motor shafts, gear assemblies, and rotating components, this set screw maintains clamping force through thermal cycling and mechanical stress, preventing costly downtime and equipment damage. The cup tip ensures maximum contact pressure for secure positioning of components on shafts and axles.
Specification Summary & Compliance
Manufactured to ASME B18.3 specifications with Class 3A thread fit precision and UNC coarse thread profile. The set screw features 5/16"-18 thread size with 1-1/2" length and 5/32" hex drive. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The black-oxide alloy steel construction meets ASTM F912 standards with Rockwell C45 hardness rating for optimal strength and wear resistance.
