#4-40 X 3/8" Socket Head Cap Screws | Alloy Steel Black Oxide (1 / Pkg.)

Mutual ScrewSKU: 0406CSPKC

Price:
Sale price$15.70per 100( $0.16 each)
Pieces 100
Measurement type Inch
Thread size #4-40
Length 3/8
Material Alloy Steel
Finish Black Oxide
Drive Hex Socket
Head style Socket
Threads per inch 40
Weight 1.0 lb

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.P65Warnings.ca.gov.

Description

Socket Head Cap Screws crafted from high-strength alloy steel, finished in a durable thermal black oxide. Sized 4-40 thread by 3/8" length, these fasteners provide reliable clamping for precision assemblies, electronics enclosures, robotics, and automotive applications.

  • Material: alloy steel for high strength and durability
  • Finish: thermal black oxide for low glare and corrosion resistance
  • Size: 4-40 thread with 3/8" length (approximately 0.375 inches)
  • Drive: socket head for flush seating and precise torque
  • Tolerances: engineered to tight tolerances for reliable fastening in precision assemblies

Built for durability in demanding environments, the alloy steel composition offers excellent tensile strength, while the thermal black oxide finish delivers low glare and improved corrosion resistance in everyday use. The compact 4-40 size is a staple in small hardware projects, offering strong engagement in relatively thin panels and assemblies.

  • Precision equipment and instrumentation
  • Electronics enclosures and control panels
  • Robotics and automation assemblies
  • Small automotive or workshop projects

Tips for use: Pair with matching 4-40 nuts or tapped holes and apply torque within your component's specifications. Store and handle with care to preserve the finish.

Upgrade your toolkit with these high-quality alloy steel socket head cap screws—reliable, strong, and built to last.

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800-222-0324

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