Mutual Screw & Supply

M30-3.5 X 55mm Socket Cap Screws | Hex Socket Drive | Fully Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (3 / Pkg.)

M30-3.5 X 55mm Socket Cap Screws | Hex Socket Drive | Fully Threaded | Class - Main image
$28.91 $48.18 In stock

These M30-3.5 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: M30-3.5
  • 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: M30-3.5
  • Length: 55mm
  • Measurement type: Metric
  • Pack quantity: 3 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 (4.6 / 5 · 5 reviews)

Michael ★★★★★

Installed these on a jig I’ve been building and the black oxide finish gives them a nice, uniform look that resists fingerprints well. The 55mm length was exactly what I needed for a thick steel bracket.

Lucy N. ★★★★★

I was a bit skeptical about the price for just three screws, but the 12.9 alloy steel feels incredibly tough and the black oxide finish looks really clean on my jig. They fit snugly without any wobble during assembly.

Nicholas Q. ★★★★★

These hefty bolts threaded in perfectly on my jig setup, and the black oxide finish looks clean on the assembly. The hex socket drive held up well under my torque wrench without any stripping. Exactly what I needed for this tooling project.