#4-40 X 5/16" Machine Screws | Undercut Flat Head | Phillips Drive | 18/8 Stainless Steel Black Oxide (8000/Pkg.)

Mutual ScrewSKU: 0405MPU188BKC

Price:
Sale price$259.26per 8000( $0.03 each)
Pieces 8000
Measurement type Inch
Thread size #4-40
Diameter 4
Length 5/16
Material 18/8 Stainless Steel
Grade 18/8
Finish Black Oxide
Drive Phillips
Head style Undercut Flat
Threads per inch 40
Thread style Fully Threaded
Weight 7.0 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

Discover a high-performance fastener designed for reliability and a clean, professional finish: the Machine Screws Phil Undercut Flat Head. Crafted from 18/8 stainless steel and finished in black oxide, these screws deliver exceptional corrosion resistance with a sleek, low-gloss appearance—perfect for metalwork, electronics, cabinetry, and appliances.

Key Features

  • Undercut flat head design for flush seating and a streamlined surface
  • Phillips drive (PH) for easy installation with standard screwdrivers
  • Material: 18/8 stainless steel for strong, enduring durability
  • Finish: Black oxide provides a uniform dark finish and added protection
  • Thread size: 4-40 with a precise 5/16 in length for versatile fastening
  • Type: Machine screw ideal for metal-to-metal applications, electronics enclosures, and cabinetry

Specifications

  • Head style: Undercut flat
  • Drive type: Phillips
  • Material: 18/8 stainless steel
  • Finish: Black oxide
  • Thread size: 4-40
  • Length: 5/16 in

Applications

  • Electronics enclosures and panel assemblies
  • Cabinetry, furniture hardware, and appliance components
  • General metal-to-metal fastening where corrosion resistance and a clean appearance are important

Choose these Phillips underscut flat head machine screws for a durable, corrosion-resistant fastening solution that combines easy installation with a professional finish.

Can We Help?

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

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