Mutual Screw & Supply

5/16-18 X 1/2" Socket Cap Screws | Low Head Hex Socket Drive | Fully Threaded | 316 Stainless Steel (100 / Pkg.)

5/16-18 X 1/2" Socket Cap Screws | Low Head Hex Socket Drive | Fully Threaded | - Main image
$27.1 $39.85 In stock

These 5/16-18 x 1/2" socket cap screws are manufactured from 316 Stainless Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 316 Stainless Steel
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 1/2"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Grade: 316
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 1/2"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 100 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)

Joseph ★★★★★

I wasn't sure about the fully threaded design at first, but these 316 stainless screws hold tight in my jig setup without any wobble. The hex socket drive made installation quick with no stripped heads.

Scarlett ★★★★★

The low head profile on these is perfect for tight spots where a standard cap screw won't fit, and the hex socket drive grabs cleanly every time. I've already used about half the bag on a jig fixture and not a single one has stripped or shown any rust.

Zoe E. ★★★★★

Needed some corrosion-resistant fasteners for a marine project, and these 316 stainless screws didn't disappoint—the low head profile sits flush without interfering with adjacent parts. The hex socket drive gripped tightly, and all 100 pieces came cleanly threaded. Exactly what I needed for precisio