5/16"-18 X 3" Tamper Resistant Machine Screws | Flat Head | Spanner Drive | 18/8 Stainless Steel (100/Pkg.)

Mutual ScrewSKU: 3148SMF

Price:
Sale price$168.07per 100( $1.68 each)
Pieces 100
Measurement type Inch
Thread size 5/16-18
Length 3
Material 18/8 Stainless Steel
Grade 18/8
Finish Plain
Drive Spanner
Head style Flat
Threads per inch 18
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

Industrial fasteners for machinery, control panels, and enclosures. Precision engineered corrosion resistant machine screws designed for secure, flush installations in harsh environments.

Specs

  • Diameter: 5/16 inch
  • Length: 3 inch
  • Finish: 18/8 stainless steel
  • Drive type: Spanner drive
  • Material grade: 18/8 stainless steel
  • Thread type: 5/16-18 UNC

Features

  • Corrosion resistance: 18/8 stainless steel formulation provides robust resistance to moisture, chemicals, and environmental contaminants typical in industrial facilities and outdoor enclosures.
  • Flush profile: Flat head countersunk design enables a smooth surface, minimizing snag risk on machinery panels and control housings.
  • Secure seating: Spanner drive interface requires the proper tool, improving seating integrity and reducing inadvertent loosening during operation.
  • Clamping strength: 5/16-18 UNC coarse thread delivers reliable engagement with common metal tapped holes, enabling strong joint formation in steel and aluminum assemblies.
  • Material compatibility: 18/8 stainless steel maintains strength across typical industrial temperature ranges, supporting long service life in demanding environments.
  • Packaging: Quantity per package: 100, designed for batch installations in assembly lines and field replacements.
  • Ideal applications: Suitable for machinery housings, control panels, electrical enclosures, and other metal-to-metal fastening where a durable, flush fastener is required.

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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