S-92845A540 1/4"-20 x 5/8" ASME B18.3 Set Screws

Set Screws

0658FA00032 Set Screws
0658FA00032 Set Screws

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

Part No.
Part No. 0658FA00032
Equivalent to mcmaster :
92845A540

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 5/8"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Tip Type Extended
Tip Length 0.067"
Tip Length Tolerance -0.005" to 0"
Tip Diameter 0.156"
Tip Diameter Tolerance -0.007" to 0"
Drive Style Hex
Drive Size 1/8"

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 extended service life
  • Exceptional holding power ensured by Class 3A thread fit, providing tighter tolerances and more reliable fastening
  • High-strength durability with Rockwell B80 hardness, resisting wear and deformation under load
  • Secure, flush installation thanks to the headless and hex drive design, preventing snagging and allowing for compact assemblies
  • Enhanced grip and alignment from the extended tip configuration, improving positioning and reducing component slippage
  • Wide industrial compatibility with UNC coarse threads and 1/4"-20 size, facilitating easy assembly and disassembly
  • Regulatory peace of mind by meeting ASME B18.3 standards and being RoHS 3 and REACH compliant

Professional Applications & Engineering Value

This 1/4"-20 UNC set screw is engineered to address common industrial challenges such as component misalignment and loosening under vibration. Crafted from 18-8 Stainless Steel, it offers excellent corrosion resistance, making it suitable for applications in moist or chemical-exposed environments like machinery, automotive systems, and electrical enclosures. The extended tip provides precise contact and improved grip on shafts or collars, while the hex headless design allows for flush mounting in tight spaces. With a Class 3A thread fit and coarse UNC threads, it ensures quick installation and high clamping force, reducing maintenance needs and enhancing operational reliability in industrial set screws applications.

Specification Summary & Compliance

This set screw adheres to precise dimensional standards, including a Class 3A thread fit for superior accuracy and UNC coarse threads with a size of 1/4"-20. It meets ASME B18.3 specifications for consistency and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring environmental safety and regulatory adherence for global supply chains.

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