Mutual Screw & Supply

M20-2.5 X 55mm Socket Cap Screws | Hex Socket Drive | Fully Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (25 / Pkg.)

M20-2.5 X 55mm Socket Cap Screws | Hex Socket Drive | Fully Threaded | Class - Main image
$38.82 $52.46 In stock

These M20-2.5 x 55mm socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M20-2.5
  • Length: 55mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Grade: Class 12.9
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M20-2.5
  • Length: 55mm
  • Measurement type: Metric
  • Pack quantity: 25 per package
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Eli ★★★★★

I needed a high-strength fastener for a jig build, and these fully threaded screws handled the torque without stripping. The hex socket drive made installation straightforward even in tight spots.

Matthew ★★★★★

The black oxide coating on these screws is noticeably even and tough—they slid right into place on my jig without any binding. For the price of a 25-pack, the Class 12.9 alloy steel feels reassuringly strong for heavy clamping work.

William T. ★★★★★

The hex socket drive on these M20-2.5 x 55mm screws fits my torque wrench perfectly, making assembly of my jig frame much easier. The black oxide coating seems durable and hasn't chipped during installation. These are exactly what I needed for a solid precision assembly.