S-95235A507 8-32 x 1/2" ASME B18.3, ASTM F912 Set Screws

Set Screws

0666FA00005 Set Screws
0666FA00005 Set Screws

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

Part No.
Part No. 0666FA00005
Equivalent to mcmaster :
95235A507

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 1/2"

Thread Parameters

Thread Type UNC
Thread Size 8-32
Thread Diameter 0.164"
Thread Spacing Coarse
Thread Direction Right Hand
External Thread Fit Class 3A
Locking Type Thread Locker
Thread Locker Type Nylon Patch
Thread Locker Maximum Temperature 250°F
Thread Locker Min Temperature Not Rated

Tip & Drive Parameters

Tip Type Extended
Tip Length 0.043"
Tip Length Tolerance -0.006" to 0"
Tip Diameter 0.109"
Tip Diameter Tolerance -0.006" to 0"
Drive Style Hex
Drive Size 5/64"

Material & Strength

Material Alloy Steel
Hardness Rockwell C45

Temperature & Environment

REACH Compliant
RoHS Compliant
Specifications Met ASME B18.3, ASTM F912
Technical Drawings No drawings available at the moment, will be launched soon
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Key Features & Benefits at a Glance

  • Vibration-resistant locking: Nylon patch thread locker maintains secure fastening even under dynamic loads and temperatures up to 250°F
  • Superior thread engagement: Class 3A external thread fit ensures precise, tight tolerances for reliable assembly in demanding applications
  • High-strength durability: Alloy steel construction with Rockwell C45 hardness provides excellent resistance to wear and deformation
  • Space-saving design: Headless configuration with extended tip allows for flush mounting in confined spaces while maintaining positive drive engagement
  • Industry-standard compatibility: UNC coarse threads and ASME B18.3 compliance guarantee interchangeability and reliable performance across industrial equipment
  • Secure drive system: 5/64" hex drive provides positive torque transmission without cam-out, ensuring consistent installation force
  • Environmental compliance: Meets RoHS 3 and REACH regulations for safe use in regulated industries and global markets

Professional Applications & Engineering Value

This 8-32 UNC set screw delivers exceptional value in precision assembly applications where vibration resistance and space constraints present significant engineering challenges. The alloy steel construction with Rockwell C45 hardness ensures the fastener maintains its structural integrity under repetitive stress cycles, while the nylon patch locking mechanism provides reliable vibration resistance without requiring additional locking components. The headless hex drive design with extended tip allows for flush mounting in pulleys, gears, and collars where protruding fastener heads would interfere with adjacent components. The Class 3A thread fit guarantees precise engagement with mating parts, reducing the risk of cross-threading and ensuring consistent clamping force in automated assembly environments.

Specification Summary & Compliance

This precision set screw features 8-32 UNC coarse threads with Class 3A external thread fit for superior dimensional accuracy. Manufactured to ASME B18.3 specifications with a length of 1/2" and 5/64" hex drive. The extended tip measures 0.109" diameter with length of 0.043" and tight tolerances. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for industrial use.

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