S-93015A227 3/8"-16 x 3" Thumb Screws

Thumb Screws

0781FA00020 Thumb Screws
0781FA00020 Thumb Screws

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

Part No.
Part No. 0781FA00020
Equivalent to mcmaster :
93015A227

Basic Information

System of Measurement Inch

Head Parameters

Head Type Thumb
Thumb Screw Head Shape Round
Round-Head Thumb Screw Profile Low
Head Diameter 1 1/4"
Head Height 7/16"
Head Texture Knurled

Dimensions

Length 3"

Thread Parameters

Thread Type UNC
Thread Size 3/8"-16
Thread Diameter 0.375"
Thread Spacing Coarse
Thread Length 2 7/16"
Thread Direction Right Hand
Thread Fit Class 2A
Threading Partially Threaded

Tip & Drive Parameters

Tip Type Extended
Tip Length 3/16"
Tip Diameter 9/32"

Material & Strength

Material 18-8 Stainless Steel
Hardness Rockwell B83
Tensile Strength 80000 psi

Temperature & Environment

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 manual grip and torque application with a 1-1/4" knurled head, reducing slippage during frequent adjustments
  • Superior corrosion resistance and durability thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
  • High mechanical strength with 80,000 psi tensile strength and Rockwell B83 hardness for reliable, long-lasting fastening
  • Precise and secure thread engagement with Class 2A UNC coarse threads, ensuring consistent performance in right-hand applications
  • Easy alignment and insertion provided by the extended 3/16" tip, speeding up assembly in partially threaded setups
  • Low-profile, round-head design for space-constrained applications while maintaining easy manual operation
  • Compliance with environmental and safety standards including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices

Professional Applications & Engineering Value

This 3/8"-16 UNC thumb screw is engineered to address common challenges in industrial settings, such as the need for quick, tool-free adjustments without compromising on strength. The 18-8 stainless steel material offers excellent resistance to rust and corrosion, making it suitable for outdoor equipment, machinery panels, and electronic enclosures exposed to moisture. The knurled head ensures a firm grip even with oily hands, reducing installation time and enhancing operator safety. Its partially threaded design with an extended tip allows for smooth entry into pre-tapped holes, minimizing cross-threading risks. Ideal for applications in manufacturing, automation, and maintenance where reliable, manual fastening is critical, this screw delivers consistent performance under repetitive use.

Specification Summary & Compliance

This thumb screw adheres to UNC coarse thread standards with a Class 2A thread fit for precise dimensional accuracy and interchangeability. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufacturing follows industry specifications for right-hand threading and low-profile round-head design, supporting consistent quality in industrial fastening applications.

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