S-91385A191 8-32 x 5/16" 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
- Vibration-resistant locking with permanent Nylon Patch thread locker that maintains secure fastening even under dynamic loads
- Exceptional temperature tolerance from -50°F to 250°F, ensuring reliable performance in diverse industrial environments
- Superior corrosion protection through Black-Oxide coating on alloy steel, extending service life in demanding applications
- Precise thread engagement with Class 3A UNC coarse threads providing tighter tolerances for more secure connections
- High-strength construction with Rockwell C45 hardness, delivering excellent durability and resistance to wear
- Space-saving headless design with 5/64" hex drive for installations where clearance is limited
- Cup tip configuration that creates positive seating and prevents slipping on shaft surfaces
Professional Applications & Engineering Value
This 8-32 UNC threaded set screw addresses critical vibration-induced loosening challenges in industrial assemblies. The Nylon Patch locking technology embedded in the threads creates permanent friction that resists back-out under continuous motion and shock loads, eliminating the need for secondary locking devices. Manufactured from Black-Oxide alloy steel with Rockwell C45 hardness, it provides exceptional strength while the corrosion-resistant surface treatment ensures longevity in harsh environments. The headless hex drive design with cup tip is engineered for precision applications where space constraints exist, such as shaft collars, gears, and pulleys, making it ideal for machinery, automotive, and manufacturing equipment where reliable positional locking is paramount.
Specification Summary & Compliance
This set screw features 8-32 UNC coarse threads with Class 3A fit for precise tolerance, measuring 5/16" in length with 5/64" hex drive. Manufactured to ASME B18.3 specifications (ASTM F912) and compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. The thread locker maintains effectiveness across the operational temperature range of -50°F to 250°F, ensuring regulatory compliance and performance reliability in industrial applications.
