5/16-18 x 3/4 in. flat hex socket security machine screw

5/16-18 x 3/4 in. Flat Hex Socket Security Machine Screw

SKU:
WBB2215511
Model/MPN:
42320
Our Price:
$88.94
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Product Specifications:
Country of Origin: Made in USA
Product Depth: 1.875
Product Height: 4
Product Type: Machine Screws
Product Width: 3.125
Manufacturer Part Number: 42320
Color: Green
Length: 3/4 in
Drill Size: 3/16 in
Head: Flat
Size: 5/16-18
Thread: Coarse in
Unit of Measurement: Inch (Imperial)
Description: Tamper Resistant Machine Screw
Drive: Hex Socket - Pin
Finish: Stainless Steel
Full or Partial Thread: Full
Grade: 302HQ/18-8 Stainless Steel
Manufacturers Part Number: 42320
Material: Stainless Steel
Package Quantity: 100
Shipping Method: Parcel
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Free Shipping on Qualifying Orders Over $99
Product Specifications:
Country of Origin: Made in USA
Product Depth: 1.875
Product Height: 4
Product Type: Machine Screws
Product Width: 3.125
Manufacturer Part Number: 42320
Color: Green
Length: 3/4 in
Drill Size: 3/16 in
Head: Flat
Size: 5/16-18
Thread: Coarse in
Unit of Measurement: Inch (Imperial)
Description: Tamper Resistant Machine Screw
Drive: Hex Socket - Pin
Finish: Stainless Steel
Full or Partial Thread: Full
Grade: 302HQ/18-8 Stainless Steel
Manufacturers Part Number: 42320
Material: Stainless Steel
Package Quantity: 100
Shipping Method: Parcel

This security machine screw is designed for maintenance and assembly teams that need a fastener with a specialized drive to help deter removal with ordinary screwdrivers. Its flat head supports a clean, flush installation in metal surfaces or in countersunk softer materials.

The screw has a 5/16-18 UNC thread and a 3/4-inch length. It features a flat head with a hex socket security drive and requires a matching driver bit for installation. The source identifies 302HQ/18-8 stainless steel construction. Effective minimum order: 1 each.

Key Features:

  • Security drive: Helps discourage removal using ordinary screwdrivers.
  • Matching bit required: Supports positive tool engagement during installation.
  • Flat head profile: Installs flush with metal surfaces or countersunk softer materials.
  • 5/16-18 UNC thread: Provides the specified thread size for compatible tapped applications.
  • Minimum order of 1 each: Allows ordering from a single unit.

Choose this flat-head security machine screw when your application calls for a 5/16-18 UNC fastener with a specialized hex socket drive and flush-mounting profile.

Country of Origin: Made in USA
Product Depth: 1.875
Product Height: 4
Product Type: Machine Screws
Product Width: 3.125
Manufacturer Part Number: 42320
Color: Green
Length: 3/4 in
Drill Size: 3/16 in
Head: Flat
Size: 5/16-18
Thread: Coarse in
Unit of Measurement: Inch (Imperial)
Description: Tamper Resistant Machine Screw
Drive: Hex Socket - Pin
Finish: Stainless Steel
Full or Partial Thread: Full
Grade: 302HQ/18-8 Stainless Steel
Manufacturers Part Number: 42320
Material: Stainless Steel
Package Quantity: 100
Shipping Method: Parcel
Width: 1.88 in
Height: 4.00 in
Depth: 3.13 in
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