S-94115A303 1/4"-28 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
- Precise Thread Fit: Class 3A thread tolerance ensures tight, secure fastening with minimal backlash, ideal for high-vibration environments.
- Corrosion-Resistant Coating: Black-oxide finish on alloy steel provides enhanced durability and protection against rust in harsh industrial settings.
- Non-Marring Tip: Nylon 6/6 plastic tip prevents damage to shafts and components, maintaining surface integrity during repeated adjustments.
- Wide Temperature Tolerance: Nylon tip operates reliably from -50° to 250°F, ensuring performance in extreme thermal conditions.
- High Strength Material: Alloy steel with Rockwell C28 hardness offers excellent shear and tensile strength for long-term load-bearing applications.
- Secure Hex Drive: 1/8" hex drive allows for high-torque installation without slippage, facilitating efficient assembly and maintenance.
- Headless Design: Flush mounting saves space and reduces protrusion risks in compact machinery and rotating assemblies.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw with a nylon tip is engineered to address common industrial challenges like component slippage and surface damage. The fine UNF thread and Class 3A fit provide superior holding power in precision equipment, while the headless, hex drive design enables easy access in confined spaces. Ideal for securing gears, pulleys, and collars on shafts, the nylon 6/6 tip acts as a resilient lock, reducing fretting and wear without requiring additional locking mechanisms. Its compliance with ASME B18.3 ensures consistent quality, making it a reliable choice for automotive, aerospace, and manufacturing applications where vibration resistance and repeatable performance are critical.
Specification Summary & Compliance
This set screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for high precision, manufactured from alloy steel with a black-oxide surface treatment. It meets ASME B18.3 specifications for dimensional accuracy and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in global supply chains.
