Mutual Screw & Supply

5/16-24 X 7/8" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel Thermal Black Oxide (1000 / Pkg.)

5/16-24 X 7/8" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel - Main image
$377.14 $598.63 In stock

These 5/16-24 x 7/8" 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 size: 5/16-24
  • Length: 7/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread size: 5/16-24
  • Length: 7/8"
  • Threads per inch: 24
  • Measurement type: Inch
  • Pack quantity: 1000 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)

Mia K. ★★★★★

Needed a solid batch of black oxide fasteners for a tooling project, and these have held up perfectly under repeated wrenching. The hex socket drive really does grip without stripping.

James ★★★★★

Ordered a thousand of these for our jig builds and the hex socket drive seated perfectly every time—no stripped heads on the first pass. The thermal black oxide gives them a nice uniform look and they’ve held up through a week of heavy clamping without any rust.

Samuel ★★★★★

The black oxide finish on these screws is much more consistent than the last batch I got elsewhere, and the hex socket drive makes them easy to work with on my jigs. Each one threads smoothly without any binding.