S-95235A574 3/8"-24 x 3/4" ASME B18.3, ASTM F912 Set Screws

Set Screws

0666FA00032 Set Screws
0666FA00032 Set Screws

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

Part No.
Part No. 0666FA00032
Equivalent to mcmaster :
95235A574

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 3/4"

Thread Parameters

Thread Type UNF
Thread Size 3/8"-24
Thread Diameter 0.375"
Thread Spacing Fine
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 0.099"
Tip Length Tolerance -0.01" to 0"
Tip Diameter 0.25"
Tip Diameter Tolerance -0.009" to 0"
Drive Style Hex
Drive Size 3/16"

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

  • Superior vibration resistance with nylon patch thread locker that maintains integrity up to 250°F, preventing loosening in high-stress environments
  • Precise component positioning thanks to the extended tip design with controlled diameter and length tolerances for accurate alignment
  • Exceptional thread engagement with Class 3A external thread fit ensuring tight, secure fastening in demanding applications
  • High durability and strength from alloy steel construction with Rockwell C45 hardness for long service life under heavy loads
  • Easy installation and removal with standard 3/16" hex drive design that provides reliable torque transmission
  • Fine thread advantage with 3/8"-24 UNF threads offering better adjustment precision and higher tensile strength than coarse threads
  • Regulatory compliance assurance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

This alloy steel set screw with nylon patch thread locker addresses critical industrial challenges where vibration-induced loosening compromises assembly integrity. The Class 3A thread fit provides superior engagement in precision machinery, while the extended tip design ensures positive location in collars, hubs, and shafts. Engineered for industrial set screw applications requiring reliable positioning under dynamic loads, the fine UNF threads distribute stress more evenly than coarse alternatives. The combination of Rockwell C45 hardness and vibration-resistant locking makes this hex drive set screw ideal for automotive components, manufacturing equipment, and power transmission systems where maintenance access is limited and reliability is paramount.

Specification Summary & Compliance

This set screw features precision 3/8"-24 UNF fine threads with Class 3A external thread fit for superior engagement. Manufacturing complies with ASME B18.3 standards where applicable. The extended tip maintains tight dimensional control with tip diameter of 0.25" (-0.009" to 0" tolerance) and tip length of 0.099" (-0.01" to 0" tolerance). The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting current environmental regulations for industrial fasteners.

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