S-91375A089 3-48 x 1/8" 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
- Exceptional holding power with Class 3A thread fit for secure, vibration-resistant fastening in demanding applications
- Superior corrosion resistance from the black-oxide finish on alloy steel, extending service life in various industrial environments
- High-strength durability with Rockwell C45 hardness, ensuring the screw maintains integrity under high stress and repeated use
- Reliable, flush installation due to the headless hex drive design, ideal for confined spaces and sleek assemblies
- Easy installation and removal with a standard 0.050" hex drive and right-hand coarse (UNC) threads, reducing assembly time
- Secure component positioning using the cup tip, which bites into surfaces to prevent slippage and movement
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence
Professional Applications & Engineering Value
This 3-48 UNC set screw is engineered to address critical challenges in precision assemblies, such as securing collars, gears, and pulleys on shafts without protruding heads. The black-oxide alloy steel construction provides a robust barrier against rust and wear, essential for machinery exposed to moisture or harsh conditions. Its headless hex drive and cup tip design enable flush mounting and firm gripping, minimizing the risk of loosening due to vibrations in automotive, aerospace, and industrial equipment. With a coarse thread spacing and Class 3A thread fit, it offers quick installation and high clamping force, reducing maintenance needs and enhancing operational reliability in right-hand thread applications.
Specification Summary & Compliance
This set screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threads with a 3-48 size. It meets ASME B18.3 specifications for consistency and performance, and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial use.
