S-91375A711 1/2"-13 x 7/8" 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 corrosion resistance from the black-oxide finish, extending service life in demanding environments.
- Superior holding power and vibration resistance due to the Class 3A thread fit, ensuring a secure and reliable fastening.
- High tensile strength and durability provided by the alloy steel construction and Rockwell C45 hardness.
- Easy installation and removal with the 1/4" hex drive, allowing for high torque application in confined spaces.
- Effective point contact and minimal surface marring from the cup tip, ideal for precise positioning on shafts and collars.
- Broad industrial compatibility with the standard 1/2"-13 UNC coarse thread, simplifying sourcing and replacement.
- Compliance with major industry and environmental standards guarantees product reliability and regulatory acceptance.
Professional Applications & Engineering Value
This black-oxide alloy steel set screw is engineered to solve critical challenges in industrial assembly and machinery. The headless design and hex drive allow for flush mounting in tight spaces, preventing interference and enabling high-torque tightening for permanent or semi-permanent fixtures. The Class 3A thread fit on the 1/2"-13 UNC coarse thread provides a precise, snug fit that resists loosening under vibration, a common failure point in motors, pulleys, and gear assemblies. The cup tip concentrates force for a strong bite into the shaft, minimizing slippage. Combined with the corrosion-resistant black-oxide finish, this screw delivers long-term reliability in automotive, aerospace, and heavy equipment applications where strength and environmental resistance are paramount.
Specification Summary & Compliance
This set screw features a 1/2"-13 UNC coarse thread with a precision Class 3A fit for superior thread engagement. Manufacturing and quality are governed by ASME B18.3 and ASTM F912 specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it meets the latest standards for restricted substances and is safe for use in regulated markets.
