S-92845A618 5/16"-18 x 3/4" ASME B18.3 Set Screws

Set Screws

0658FA00040 Set Screws
0658FA00040 Set Screws

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

Part No.
Part No. 0658FA00040
Equivalent to mcmaster :
92845A618

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 3/4"

Thread Parameters

Thread Type UNC
Thread Size 5/16"-18
Thread Diameter 0.313"
Thread Spacing Coarse
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 industrial environments
  • Maximum holding power ensured by Class 3A thread fit for tight, secure fastening in critical assemblies
  • Enhanced grip and anti-loosening due to the extended tip design that bites into mating surfaces
  • High durability and strength from Rockwell B80 hardness, resisting wear under repeated use
  • Easy installation and removal with 5/32" hex drive, providing reliable torque transmission without head protrusion
  • Wide compatibility with UNC coarse threads (5/16"-18) for quick assembly in various industrial applications
  • Regulatory compliance meeting ASME B18.3, RoHS 3, and REACH for safe, eco-conscious usage

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw is engineered to address common industrial challenges like component slippage and vibration-induced loosening. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for applications in machinery, automotive, and outdoor equipment where exposure to moisture or chemicals is a concern. Its extended tip and Class 3A thread fit provide a firm bite into shafts, pulleys, or collars, ensuring reliable positioning without frequent re-tightening. The hex headless design allows for flush mounting in confined spaces, while the coarse UNC threads facilitate quick installation, reducing assembly time and maintenance costs in high-volume production settings.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including Class 3A thread fit for tight tolerances and UNC coarse threading (5/16"-18). It meets ASME B18.3 specifications for consistency and reliability in manufacturing. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures it is free from hazardous substances, supporting sustainable and safe industrial practices.

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