S-92505A635 1/4"-28 x 3/8" ASME B18.3, ASTM F912 Set Screws

Set Screws

0657FA00055 Set Screws
0657FA00055 Set Screws

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

Part No.
Part No. 0657FA00055
Equivalent to mcmaster :
92505A635

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 3/8"

Thread Parameters

Thread Type UNF
Thread Size 1/4"-28
Thread Diameter 0.25"
Thread Spacing Fine
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 Black-Oxide 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
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with Black Oxide coating, extending service life in demanding industrial environments.
  • Exceptional holding power from the extended tip design (0.156" diameter), ensuring secure and permanent component positioning.
  • High-strength durability provided by alloy steel construction and Rockwell C45 hardness, resisting wear and deformation under load.
  • Precise, reliable fastening with Class 3A thread fit and UNF fine threads, offering excellent vibration resistance and minimal loosening.
  • Easy installation and removal using the 1/8" hex drive, allowing for efficient assembly and maintenance in confined spaces.
  • Headless, space-saving design ideal for applications where a flush surface is required without protruding components.
  • Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.

Professional Applications & Engineering Value

This Black Oxide Alloy Steel Set Screw is engineered to address critical industrial challenges, such as vibration-induced loosening and corrosion in machinery. The extended tip and fine UNF threads create a deeper, more secure engagement with the mating part, significantly enhancing holding power in pulleys, gears, and collars. Made from high-strength alloy steel and treated with a protective Black Oxide finish, it resists rust and wear in harsh conditions, reducing maintenance frequency. The headless, hex drive design allows for flush mounting in tight spaces, making it ideal for precision equipment, automotive assemblies, and manufacturing tools where reliability and space optimization are paramount.

Specification Summary & Compliance

This set screw features a 1/4"-28 UNF thread with Class 3A fit for high precision and strength. It complies with ASME B18.3 specifications, ensuring dimensional accuracy and performance. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for industrial use.

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