S-92845A719 5-40 x 1/4" ASME B18.3 Set Screws

Set Screws

0658FA00057 Set Screws
0658FA00057 Set Screws

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

Part No.
Part No. 0658FA00057
Equivalent to mcmaster :
92845A719

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 1/4"

Thread Parameters

Thread Type UNC
Thread Size 5-40
Thread Diameter 0.125"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Tip Type Extended
Tip Length 0.033"
Tip Length Tolerance -0.005" to 0"
Tip Diameter 0.083"
Tip Diameter Tolerance -0.005" to 0"
Drive Style Hex
Drive Size 1/16"

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
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments.
  • Exceptional thread precision with Class 3A fit ensures tight, reliable fastening without cross-threading.
  • High mechanical strength backed by Rockwell B80 hardness for long-term durability under load.
  • Secure tamper-resistant installation using the headless hex drive design with 1/16" drive size.
  • Optimized for high-vibration applications with coarse UNC threads and extended tip for enhanced grip.
  • Full compliance with industry standards including ASME B18.3 for consistent performance and safety.
  • Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations for global use.

Professional Applications & Engineering Value

This 5-40 UNC set screw is engineered to address critical fastening challenges in precision assemblies. The 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for industrial machinery, electronics, and automotive components. Its headless hex drive and extended tip design allow for flush mounting and improved torque transmission, preventing loosening in high-vibration settings. The coarse thread and Class 3A thread fit ensure quick installation and reliable clamping force, reducing assembly time and maintenance needs. Ideal for applications demanding secure shaft collars, gear positioning, and adjustable mechanisms, this set screw delivers consistent performance where precision and reliability are non-negotiable.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 specifications with a Class 3A thread fit for precise dimensional accuracy. It features a 5-40 UNC coarse thread, right-hand direction, and an extended tip with controlled diameter and length tolerances. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets international environmental and safety standards for industrial use.

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