S-91221A965 1/4"-20 x 3/4" Plastic Socket Head Screws

Plastic Socket Head Screws

0021FA00084 Plastic Socket Head Screws
0021FA00084 Plastic Socket Head Screws

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

Part No.
Part No. 0021FA00084
Equivalent to mcmaster :
91221A965

Basic Information

Color Off-White
System of Measurement Inch

Head Parameters

Head Type Socket
Head Diameter 3/8"
Head Height 1/4"
Socket Head Profile Standard

Dimensions

Length 3/4"

Thread Parameters

Thread Type UNC
Thread Size 1/4"-20
Thread Diameter 0.25"
Thread Spacing Coarse
Thread Direction Right Hand
Thread Fit Class 2A
Threading Fully Threaded

Tip & Drive Parameters

Drive Style Hex
Drive Size 3/16"

Material & Strength

Material Glass-Filled Nylon Plastic
Hardness Not Rated

Temperature & Environment

Temperature Range -20° to 230° F
REACH Compliant
RoHS Compliant
Technical Drawings No drawings available at the moment, will be launched soon
In Stock
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Key Features & Benefits at a Glance

  • Enhanced strength and durability with glass-filled nylon construction, providing reliable performance in demanding industrial environments.
  • Wide temperature resistance from -20° to 230° F, ensuring stability in varied operating conditions without degradation.
  • Precise UNC coarse threading with Class 2A fit for easy assembly, secure fastening, and reduced risk of cross-threading.
  • Hex socket drive design allows for high torque application and secure installation in confined spaces with standard tools.
  • Lightweight and corrosion-resistant off-white plastic material, ideal for applications where metal fasteners may cause galvanic corrosion or add unnecessary weight.
  • Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global standards for hazardous substance restrictions.
  • Fully threaded shank offers consistent grip and uniform load distribution along the entire length for improved holding power.

Professional Applications & Engineering Value

This glass-filled nylon socket head cap screw is engineered to address common industrial challenges, such as corrosion in harsh environments and electrical insulation needs. The UNC coarse thread and Class 2A fit provide quick, reliable fastening with minimal effort, reducing assembly time and labor costs. Its right-hand thread direction and hex drive style ensure compatibility with standard tools, making it ideal for machinery, electronics, and automotive applications where vibration resistance and non-conductive properties are critical. The material's inherent strength and temperature range from -20° to 230° F make it suitable for both low and high-temperature settings, offering long-term durability without the risk of rust or degradation, thereby enhancing operational efficiency and reducing maintenance cycles.

Specification Summary & Compliance

This fastener adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy and ease of assembly. It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and meets environmental safety requirements. The specifications include a thread size of 1/4"-20, length of 3/4", and drive size of 3/16", providing consistent performance for industrial fastening applications.

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