S-91375A615 3/8"-16 x 1/4" ASME B18.3, ASTM F912 Set Screws

Set Screws

0604FA00290 Set Screws
0604FA00290 Set Screws

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

Part No.
Part No. 0604FA00290
Equivalent to mcmaster :
91375A615

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 1/4"

Thread Parameters

Thread Type UNC
Thread Size 3/8"-16
Thread Diameter 0.375"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Tip Type Cup
Drive Style Hex
Drive Size 3/16"

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
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with black-oxide finish, extending service life in demanding industrial environments.
  • Exceptional holding power from the cup tip design, preventing component slippage under high vibration or load.
  • Precise, reliable fastening ensured by Class 3A thread fit, minimizing the risk of cross-threading and ensuring consistent clamp load.
  • High-strength durability from alloy steel with Rockwell C45 hardness, resisting wear and deformation in heavy-duty applications.
  • Easy installation and removal with 3/16" hex drive, allowing for high torque application in confined, headless designs.
  • Broad industrial compatibility with 3/8"-16 UNC coarse threads, facilitating quick assembly and disassembly.
  • Regulatory peace of mind through compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.

Professional Applications & Engineering Value

This 3/8"-16 UNC set screw is engineered to address critical challenges in machinery assembly, where vibration resistance and secure component positioning are paramount. The black-oxide alloy steel construction provides a robust barrier against rust and wear, ideal for automotive, aerospace, and heavy equipment sectors. Its cup tip concentrates force to prevent shaft or hub damage, while the coarse thread design ensures rapid installation and high pull-out strength. The headless, hex drive configuration allows flush mounting in tight spaces, reducing protrusion risks. By integrating Class 3A thread fit precision, it eliminates loosening in dynamic loads, enhancing operational reliability and reducing maintenance downtime for B2B clients.

Specification Summary & Compliance

This set screw adheres to Class 3A thread fit for tight dimensional accuracy under UNC thread standards, with a diameter of 0.375" and coarse spacing. It meets ASME B18.3 manufacturing specifications, ensuring consistent quality. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for industrial use.

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