Mutual Screw & Supply

5/16-18 X 1-1/4" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded (100 / Pkg.)

5/16-18 X 1-1/4" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded - Main image
$6.57 $10.1 In stock

5/16-18 X 1-1/4" Hex Machine Bolts in Steel Zinc Plated. A hex head machine bolt with a partially threaded shank per ASME B18.2.1, providing an unthreaded grip length for bolted connections through clearance holes.

  • Partially threaded shank for a smooth bearing surface in the shear plane of bolted joints
  • Hex head for wrench-driven, high-torque installation
  • Zinc plating for everyday corrosion resistance

Specifications

  • Type: Hex Machine Bolts
  • Head Style: Hex
  • Material: Steel
  • Finish: Zinc Plated
  • Thread Size: 5/16-18
  • Length: 1-1/4"
  • Thread: Partially Threaded
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 (5.0 / 5 · 5 reviews)

Riley V. ★★★★★

The unthreaded grip on these bolts made aligning my heavy-duty shelf brackets so much easier than with fully threaded ones. They seated perfectly flush in the predrilled holes.

Ruby ★★★★★

Installed these on a trailer hitch bracket and the partially threaded shank gave just the right amount of grip before the threads engaged. The zinc coating has held up well through a week of rain.

Sofia D. ★★★★★

The zinc plating on these bolts is really smooth and consistent, no flaking off when I tightened them down. I used them to mount some brackets in my garage and the unthreaded grip length made alignment much easier.