S-92845A167 5/16"-18 x 1/2" ASME B18.3 Set Screws

Set Screws

0660FA00018 Set Screws
0660FA00018 Set Screws

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

Part No.
Part No. 0660FA00018
Equivalent to mcmaster :
92845A167

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 1/2"

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 316 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 316 Stainless Steel construction, ideal for harsh industrial and marine environments
  • Precise thread engagement with Class 3A fit ensuring reliable, vibration-resistant fastening in critical applications
  • High torque capability from the hex socket drive design, allowing for secure installation without stripping
  • Space-saving headless design enabling flush mounting where protruding fasteners are not feasible
  • Enhanced gripping power due to the extended tip, which bites into materials for superior holding strength
  • Consistent performance with Rockwell B80 hardness, providing durability and resistance to deformation under load
  • Broad compatibility with UNC coarse threads for quick assembly and disassembly in various industrial setups

Professional Applications & Engineering Value

This 5/16"-18 UNC set screw in 316 Stainless Steel is engineered to address common industrial challenges, such as component slippage and corrosion-induced failure. Its headless design and hex socket drive allow for compact installations in machinery, shafts, and pulleys, while the Class 3A thread fit ensures tight tolerances that minimize loosening from vibrations. The extended tip provides aggressive biting action, securing parts in high-stress environments like marine equipment or chemical processing plants. By leveraging coarse UNC threads, it facilitates rapid assembly, reducing downtime in maintenance-heavy applications. This fastener delivers reliable performance where precision and corrosion resistance are paramount, supporting long-term operational integrity.

Specification Summary & Compliance

This set screw adheres to ASME B18.3 standards, with precise dimensions including a thread size of 5/16"-18 UNC, Class 3A thread fit for high accuracy, and an extended tip diameter of 0.203" with tight tolerances. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability in industrial use.

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