Mutual Screw & Supply

5/16-24 X 7" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc (225 / Pkg.)

5/16-24 X 7" Hex Head Cap Screws | USA Made | Grade 8 Steel Yellow Zinc (225 / - Main image
$410.2 $661.61 In stock

5/16-24 x 7" hex head cap screws for machinery, equipment assembly and general industrial fastening.

  • Grade 8 Steel Yellow Zinc construction
  • Hex head for wrench or socket drive
  • Made in the USA
  • Sold in packs of 225

Specifications

  • Thread Size: 5/16-24
  • Length: 7"
  • Threads Per Inch: 24
  • Material: Steel
  • Grade: Grade 8
  • Finish: Yellow Zinc CR+3
  • Pack Quantity: 225
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)

Stella ★★★★★

Installed these on a heavy-duty jig I’m building, and the hex heads grabbed perfectly with a socket. The 7-inch length and Grade 8 steel feel solid—no bending under torque. Glad they’re USA made.

Miles D. ★★★★★

The packaging was solid and every single screw came out clean with sharp, uniform threads. I used a 3/8 socket on the hex head and they torqued down without stripping, exactly what I need for heavy equipment assembly. This is my second box and I'll keep grabbing these for shop stock.

Benjamin ★★★★★

I was a little worried about the thread pitch matching my project, but these 5/16-24 bolts threaded in perfectly. The Grade 8 steel and yellow zinc finish give them a solid, industrial feel, and the hex head grabs nicely with a wrench. For a pack of 225, the price feels right for the quality.