Mutual Screw & Supply

M3-0.5 X 25mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (400 / Pkg.)

M3-0.5 X 25mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially - Main image
$37.7 $50.26 In stock

These M3-0.5 x 25mm 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
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M3-0.5
  • Length: 25mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Grade: Class 12.9
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M3-0.5
  • Length: 25mm
  • Measurement type: Metric
  • Pack quantity: 400 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 (5.0 / 5 · 5 reviews)

Matthew ★★★★★

These flat heads sit flush perfectly in the counterbored holes on my fixture plate, and the hex socket drive makes them easy to tighten without stripping. The 12.9 alloy steel feels rock solid—way tougher than the cheaper screws I used to buy.

Robert ★★★★★

Got a full 400-count box for a jig build and every single screw threaded clean without any stripped heads. The black oxide finish looks consistent across the batch and the 12.9 hardness feels properly stiff when torquing down.

Jacob N. ★★★★★

The partially threaded design made alignment in my jig way easier than fully threaded screws, and the black oxide finish has a nice matte look that resists smudges. At 400 per pack, I’ve got plenty for future builds without worrying about running out mid-project.