Mutual Screw & Supply

1/2-20 X 5/16" Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded | 18/8 Stainless Steel (50 / Pkg.)

1/2-20 X 5/16" Socket Cap Screws | Button Head Hex Socket Drive | Fully - Main image
$93.98 $125.3 In stock

These 1/2-20 x 5/16" socket cap screws are manufactured from 18/8 Stainless Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 18/8 Stainless Steel
  • Head style: Button Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/2-20
  • Length: 5/16"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Button Head
  • Material: 18/8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/2-20
  • Length: 5/16"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 50 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)

Ella ★★★★★

Installed these in a small jig I use daily, and the 18/8 stainless is holding up perfectly so far. The fully threaded length made seat depth predictable, and every one of the 50 in the pack spun in clean without a single stripped socket.

David A. ★★★★★

The hex drive makes these a breeze to tighten in tight spots without stripping. I used them for a jig assembly and the stainless finish looks clean and professional.

Timothy ★★★★★

Perfect fit for a small bracket repair on a jig—these button heads sit flush without interfering. The 18/8 stainless finish looks clean and resisted my wrench’s bite.