#4-40 X 1/2" Button Head Cap Screws | Steel Black Oxide (1 / Pkg.)

Mutual ScrewSKU: 0408CSBKC

Price:
Sale price$17.23per 100( $0.17 each)
Pieces 100
Measurement type Inch
Thread size #4-40
Length 1/2
Material Steel
Finish Black Oxide
Drive Hex Socket
Head style Button
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

Upgrade your assemblies with these Cap Screws Button Socket, crafted from durable steel and finished in black oxide for a sleek, low-profile look. The 4-40 thread size and 1/2" length make these small but mighty fasteners ideal for precision projects, electronics enclosures, and lightweight mechanical assemblies.

Designed for reliability, these button head socket cap screws deliver a clean, flush appearance while providing strong holding power. The internal hex drive (Allen drive) ensures easy installation with a standard Allen wrench, reducing the risk of slippage and cam-out in tight spaces.

Specifications

  • Thread size: 4-40
  • Length: 1/2"
  • Head style: Button head socket cap screw
  • Drive: Internal hex (Allen)
  • Material: Steel
  • Finish: Black oxide

This combination of steel construction and black oxide finish provides durability with a corrosion-resistant surface and a low-reflective, professional appearance. Perfect for applications where a compact, secure fastener is required without protruding heads, such as electronics housings, cabinetry, machinery dashboards, and precision instruments.

Add these cap screws to your toolkit and ensure fast, reliable assemblies with a finish that looks as good as it performs.

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If you’re not sure that this product is right for you, give us a call!
800-222-0324

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