S-92785A527 1/4"-20 x 3/16" ASME B18.3 Set Screws

Set Screws

0669FA00066 Set Screws
0669FA00066 Set Screws

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

Part No.
Part No. 0669FA00066
Equivalent to mcmaster :
92785A527

Basic Information

System of Measurement Inch

Head Parameters

Head Type Headless

Dimensions

Length 3/16"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 3A

Tip & Drive Parameters

Tip Type Cone
Cone Point Angle 118°
Drive Style Hex
Drive Size 1/8"

Material & Strength

Material 18-8 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
In Stock
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Key Features & Benefits at a Glance

  • Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
  • Exceptional holding power provided by the Class 3A thread fit, ensuring a tight, secure, and vibration-resistant connection.
  • Easy and secure installation with the 1/8" hex drive and headless design, allowing for flush mounting and access in confined spaces.
  • Effective penetration and component location thanks to the 118° cone point angle, which bites into materials for precise positioning.
  • High mechanical strength and durability from the Rockwell B80 hardness, resisting wear and deformation under load.
  • Reliable coarse (UNC) threading for quick assembly and reduced risk of cross-threading in industrial applications.
  • Full regulatory compliance with ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental standards are met.

Professional Applications & Engineering Value

This 1/4"-20 UNC set screw is engineered to solve critical challenges in machinery assembly and component fixation. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for use in demanding environments such as outdoor equipment, food processing machinery, and marine applications. Its headless design and hex drive allow for a clean, flush finish and easy installation with standard tools, preventing protrusions that could interfere with moving parts. The Class 3A thread fit and coarse UNC thread ensure a robust, vibration-proof hold, crucial for maintaining alignment in pulleys, gears, and couplings. The 118° cone point offers superior biting action into shafts and hubs, preventing slippage and ensuring precise component location. This set screw delivers reliable performance in industrial set screws applications where durability, precision, and compliance are paramount.

Specification Summary & Compliance

This set screw features a 1/4"-20 UNC thread with a Class 3A thread fit for high precision and tight tolerances. It is manufactured in compliance with the ASME B18.3 standard, ensuring consistent quality and dimensional accuracy. The product is also RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming it meets strict environmental and safety regulations for hazardous substances.

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