S-91375A925 2-64 x 1/4" ASME B18.3, ASTM F912 Set Screws

Set Screws

0604FA00508 Set Screws
0604FA00508 Set Screws

Image may differ from product. See technical specification for details.

Part No.
Part No. 0604FA00508
Equivalent to mcmaster :
91375A925

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 1/4"

Thread Parameters

Thread Type UNF
Thread Size 2-64
Thread Diameter 0.086"
Thread Spacing Fine
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Tip Type Cup
Drive Style Hex
Drive Size 0.035"

Material & Strength

Material Black-Oxide Alloy Steel
Hardness Rockwell C45

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.3, ASTM F912
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with Black-Oxide finish, extending service life in harsh industrial environments.
  • Exceptional thread precision with Class 3A fit, ensuring reliable, vibration-resistant fastening and minimal backlash.
  • High-strength durability from Alloy Steel and Rockwell C45 hardness, providing consistent performance under heavy loads.
  • Secure, flush mounting with headless hex drive design, ideal for confined spaces and smooth surface applications.
  • Enhanced grip and alignment with fine UNF threads and cup tip, preventing component slippage and improving positioning accuracy.
  • Broad regulatory compliance including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.
  • Optimized for precision tools with 0.035" hex drive, allowing for efficient installation and torque control.

Professional Applications & Engineering Value

This 2-64 UNF set screw is engineered to address critical challenges in precision assemblies where space constraints and vibration resistance are paramount. The Black-Oxide Alloy Steel construction offers enhanced corrosion protection, reducing maintenance needs in automotive, aerospace, and machinery applications. Its headless design and fine thread configuration ensure a secure, flush fit, preventing loosening under dynamic loads. The Class 3A thread fit guarantees tight tolerances, minimizing the risk of thread stripping and improving overall assembly integrity. Combined with a cup tip for superior gripping force, this set screw delivers reliable performance in high-stress environments, making it an ideal choice for securing collars, gears, and pulleys without protruding hardware.

Specification Summary & Compliance

This set screw adheres to UNF fine thread standards with a Class 3A thread fit for precise dimensional accuracy. It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability. Manufactured from Alloy Steel with a Rockwell C45 hardness, it provides consistent strength and durability for industrial applications.

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