S-92991A125 1/4"-20 x 1 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
- Superior corrosion resistance due to brass construction, ideal for harsh environments and moisture-prone applications
- Exceptional holding power with Class 3A thread fit ensuring tight, secure fastening in demanding assemblies
- Enhanced durability from Rockwell B55 hardness, providing reliable performance under repeated use
- Secure, flush mounting with headless and cup tip design, preventing component movement and surface damage
- Easy installation and removal using the 1/8" hex drive, allowing for efficient maintenance and adjustments
- Broad compatibility with UNC coarse threads, facilitating quick assembly in various industrial settings
- Regulatory compliance with RoHS 3 and REACH, ensuring safe, environmentally responsible use in global markets
Professional Applications & Engineering Value
This 1/4"-20 UNC brass set screw is engineered to address common industrial challenges, such as corrosion and loosening under vibration. The brass material offers excellent resistance to rust and chemical exposure, making it suitable for marine, electrical, and plumbing applications where moisture is a concern. Its Class 3A thread fit and coarse thread spacing provide a precise, tight grip that minimizes backlash in machinery and equipment. The cup tip design concentrates pressure for secure shaft or component locking without slippage, while the headless and hex drive configuration allows for unobtrusive installation in confined spaces. Ideal for precision assemblies requiring reliable, long-term fastening, this screw helps reduce maintenance downtime and enhances operational safety in industrial set screws applications.
Specification Summary & Compliance
This set screw adheres to ASME B18.3 standards, ensuring consistent quality and dimensional accuracy. Thread specifications include 1/4"-20 UNC with a Class 3A fit for tight tolerances and right-hand, coarse threading. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting environmentally safe manufacturing and use in regulated industries.
