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Class 12.9 Alloy Steel Socket Cap Screw, Black Oxide Finish, Button Head, Internal Hex Drive, Meets ISO 7380, 20mm Length, Fully Threaded, M5-0.8 Metric Coarse Threads, Imported (Pack of 100)

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Specifications for this item
Drive Style
Internal Hex
Head Height
0.073  inches
Part Number
Thread Style
Metric Coarse
Brand Name
Small Parts
Specification Met
ISO 7380
Class 12.9
Thread Style
Right Hand
Number of Items
Material Type
Alloy Steel
Thread Coverage
Fully Threaded
Hex Wrench
4  millimeters
Size Name
Head Diameter
0.262  inches
Exterior Finish
Black Oxide
Thread Class
Head Style
Import Designation
Thread Size
Overall Length
20  millimeters
System of Measurement

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Key Features

  • Class 12.9 alloy steel is often used in applications where strength is the primary consideration
  • Black oxide finish offers mild corrosion resistance and lubricity
  • Button head has a rounded, low-profile top that is suitable for light duty applications
  • Internal hex drive has a hexagonal slot that turns using an Allen key driver
  • Meets ISO 7380 specifications

Package Details

Shipping Weight: 0.75 pounds
Package Size: 3.2 x 2.7 x 1.7 inches

Product Description

The class 12.9 alloy steel socket cap screw has a black oxide finish and a button head with an internal hex drive, and meets International Organization for Standards ISO 7380 specifications. Class 12.9 alloy steel, composed of quenched and tempered alloy steel, is often used in applications where strength is the primary consideration. The material is magnetic. The black oxide finish offers mild corrosion resistance and lubricity. The button head is round with a low profile and short vertical sides, and is suitable for light duty applications. The internal hex drive, also known as a hex-socket drive, has a hexagonal slot that requires an Allen key driver, also known as a hex key or Allen wrench.

Socket cap screws are threaded fasteners that have a cap head with an internal socket drive for installing in areas with limited side clearance. These screws are available with a variety of head shapes, which determine how the screw interacts with the mating surface, and drive styles, which determine the type of tool required to install the screw.

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