S-92845A757 5/16"-24 x 1" ASME B18.3 Set Screws

Set Screws

0658FA00091 Set Screws
0658FA00091 Set Screws

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

Part No.
Part No. 0658FA00091
Equivalent to mcmaster :
92845A757

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 1"

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 with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability
  • Precise, secure fastening ensured by Class 3A thread fit, minimizing backlash and maintaining alignment in critical assemblies
  • High torque transmission via the 5/32" hex drive, allowing for easy installation and removal with standard tools
  • Enhanced grip and positioning from the extended tip design, providing better contact and reducing component slippage
  • Consistent mechanical performance with Rockwell B80 hardness, offering excellent strength and wear resistance
  • Reliable fine thread spacing (UNF) for improved tension control and vibration resistance in dynamic applications
  • Broad industry compliance meeting ASME B18.3 standards, RoHS 3, and REACH, ensuring safety and regulatory adherence

Professional Applications & Engineering Value

This 5/16"-24 UNF Class 3A set screw is engineered to address common industrial challenges such as component misalignment and loosening under vibration. Crafted from 18-8 Stainless Steel, it provides exceptional corrosion resistance, making it suitable for outdoor, marine, and chemical-exposed settings. The headless hex drive design allows for flush mounting in confined spaces, while the extended tip ensures positive seating on shafts or collars, preventing rotational slip. Ideal for high-torque applications in machinery, automotive, and aerospace assemblies, this fastener delivers reliable, repeatable clamping force. Its fine thread spacing and precise Class 3A thread fit contribute to superior vibration resistance, reducing maintenance needs and enhancing operational safety in demanding environments.

Specification Summary & Compliance

This set screw features a 5/16"-24 UNF thread with Class 3A fit for high precision and minimal tolerance. It complies with ASME B18.3 manufacturing specifications, ensuring dimensional accuracy and performance reliability. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations. Additional details include a tip diameter of 0.203" with specified tolerances and Rockwell B80 hardness for consistent mechanical properties.

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