#4-40 X 3/8" Machine Screws | Round Head | Phillips Drive | Steel Black Oxide (10000/Pkg.)

Mutual ScrewSKU: 0406MPRBKC

Price:
Sale price$256.75 Regular price$350.81per 10000( $0.03 each)
Pieces 10000
Measurement type Inch
Thread size #4-40
Diameter 4
Length 3/8
Material Steel
Grade Steel
Finish Black Oxide
Drive Phillips
Head style Round
Threads per inch 40
Thread style Fully Threaded
Weight 12.0 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

Engineered for reliability and precision, these Machine Screws Phil Round Steel Black Oxide 4/40 x 3/8 are ideal for compact assemblies where a secure Phillips-drive fastener is required.

Overview: Round Phillips head machine screws in a durable steel with black oxide finish for corrosion resistance and a clean, low-glare appearance.

Specifications

  • Thread size: 4-40
  • Length: 3/8 inch
  • Head type: Phillips round head
  • Material: Steel
  • Finish: Black oxide

These screws are designed to pair with corresponding 4-40 tapped holes or nuts, delivering dependable clamping in electronics enclosures, small appliances, and machinery assemblies. The Phillips drive provides easy installation and a secure seating, while the black oxide finish helps reduce corrosion and minimize glare in precision applications.

Ideal uses include electronics housings, model-making, automotive interiors, and lightweight structural assemblies where a compact, strong fastener is needed. For best results, use with a properly sized screwdriver to avoid cam-out and avoid over-tightening.

Why choose our 4/40 x 3/8 Machine Screws? Consistent manufacturing tolerances, durable steel, and a finish that resists wear in everyday environments help ensure reliable performance over time. Stocked for quick shipping, these screws support fast, hassle-free project completion.

Add these Phillips round head machine screws to your hardware kit and keep your assemblies secure with a trusted fastener.

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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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