S-91375A340 1/4"-28 x 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 corrosion resistance with black-oxide coating, extending service life in harsh industrial environments.
- Exceptional holding power due to Class 3A thread fit, ensuring precise, vibration-resistant fastening.
- High-strength durability from alloy steel and Rockwell C45 hardness, resisting deformation under heavy loads.
- Secure, flush installation with headless and cup tip design, preventing protrusion and providing concentrated gripping force.
- Easy installation and removal using a standard 1/8" hex key, saving time and reducing tooling requirements.
- Reliable performance in fine-thread applications with 1/4"-28 UNF right-hand threads, ideal for precise adjustments.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory acceptance.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to address critical challenges in industrial assembly, such as component slippage and corrosion-induced failure. The cup tip design concentrates force on a small area, providing superior resistance to rotational forces in shaft collars, gears, and pulleys. Its Class 3A thread fit and fine UNF threads ensure minimal backlash and precise positioning in high-vibration environments. The hex drive allows for high-torque installation in confined spaces, while the headless construction maintains a clean, unobstructed surface. Ideal for machinery, automotive, and precision equipment, this screw delivers long-term reliability where corrosion resistance and durability are paramount.
Specification Summary & Compliance
This set screw adheres to Class 3A thread tolerance for precise fit, with 1/4"-28 UNF fine threads and right-hand direction. Manufactured to ASME B18.3 specifications using alloy steel hardened to Rockwell C45. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met.
