Mutual Screw & Supply

#4-40 X 1/4" Socket Cap Screws | Button Head Hex Socket Drive | 18/8 Stainless Steel Black Oxide (1000 / Pkg.)

#4-40 X 1/4" Socket Cap Screws | Button Head Hex Socket Drive | 18/8 Stainless - Main image
$18.69 $29.2 In stock

These #4-40 x 1/4" socket cap screws are manufactured from 18/8 Stainless Steel with a black oxide finish, featuring a hex socket drive and a button head. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 18/8 Stainless Steel, Black Oxide finish
  • Drive: Hex Socket
  • Head style: Button
  • Thread size: #4-40
  • Length: 1/4"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: 18/8 Stainless Steel
  • Finish: Black Oxide
  • Grade: 18/8
  • Head style: Button
  • Drive type: Hex Socket
  • Thread size: #4-40
  • Length: 1/4"
  • Threads per inch: 40
  • Measurement type: Imperial
  • Pack quantity: 1000 per package

Please note: This item is excess stock and is sold non-cancelable, non-refundable, and non-returnable. Please call us with any questions about this item before ordering.

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)

Emma A. ★★★★★

The black oxide finish on these #4-40 screws looks great and seems durable, and the hex socket drive made installation quick with no stripping. They fit perfectly into my jig for a small machinery project I've been working on.

Stella W. ★★★★★

Just got my hands on these screws for a small jig I’m building—the hex socket drive made installation a breeze with my Allen wrench. The black oxide coating looks sleek and should resist rust better than plain stainless.

Daniel ★★★★★

I’ve been using these for mounting small jig plates in my shop, and the black oxide finish holds up well to oily hands without rusting. The hex socket drive bites nicely with a standard Allen key, making them easy to install even in tight spots.