S-92845A751 5/16"-24 x 1/4" ASME B18.3 Set Screws

Set Screws

0658FA00085 Set Screws
0658FA00085 Set Screws

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

Part No.
Part No. 0658FA00085
Equivalent to mcmaster :
92845A751

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 1/4"

Thread Parameters

Thread Type UNF
Thread Size 5/16"-24
Thread Diameter 0.313"
Thread Spacing Fine
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Tip Type Extended
Tip Length 0.082"
Tip Length Tolerance -0.005" to 0"
Tip Diameter 0.203"
Tip Diameter Tolerance -0.008" to 0"
Drive Style Hex
Drive Size 5/32"

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B80

Temperature & Environment

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

  • Superior corrosion resistance from 18-8 stainless steel construction, ensuring long-term reliability in harsh environments
  • Precise thread engagement with Class 3A fit for secure fastening and vibration resistance in critical assemblies
  • Extended tip design provides deeper penetration and improved grip on mating components
  • Fine UNF threading delivers higher tensile strength and better load distribution compared to coarse threads
  • Hex drive compatibility with standard 5/32" tools for easy installation and removal in confined spaces
  • Consistent performance maintained through Rockwell B80 hardness for durability under repeated use
  • Regulatory compliance with RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

This 18-8 stainless steel set screw with Class 3A UNF fine threading addresses critical engineering challenges in precision assemblies where vibration resistance and positional accuracy are paramount. The extended tip design creates positive seating in shaft collars, pulleys, and gears, preventing component slippage under dynamic loads. Manufactured to ASME B18.3 specifications, these headless set screws provide reliable fastening in machinery, automotive, and aerospace applications where flush mounting is essential. The hex drive configuration ensures maximum torque transmission while the stainless steel construction maintains integrity in corrosive environments, making it ideal for food processing equipment, marine components, and outdoor industrial applications.

Specification Summary & Compliance

This precision fastener features 5/16"-24 UNF Class 3A threads with tight tolerance control on both thread diameter and pitch. The extended tip maintains dimensional accuracy with tip diameter of 0.203" (-0.008" to 0 tolerance) and tip length of 0.082" (-0.005" to 0 tolerance). Manufacturing complies with ASME B18.3 standards for dimensional consistency and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety.

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