Mutual Screw & Supply

3/8-16 X 4" Hex Machine Bolts | Steel Hot-Dip Galvanized | Partially Threaded (200 / Pkg.)

3/8-16 X 4" Hex Machine Bolts | Steel Hot-Dip Galvanized | Partially Threaded - Main image
$50.24 $81.04 In stock

3/8-16 X 4" Hex Machine Bolts in Steel Hot-Dip Galvanized. 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
  • Hot-dip galvanized for heavy-duty outdoor corrosion resistance

Specifications

  • Type: Hex Machine Bolts
  • Head Style: Hex
  • Material: Steel
  • Finish: Hot-Dip Galvanized
  • Thread Size: 3/8-16
  • Length: 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 (4.4 / 5 · 5 reviews)

Samuel P. ★★★★★

The partially threaded shank made aligning these bolts in steel beams so much easier, and the grip length was spot on. The galvanized finish feels thick and durable, perfect for outdoor use. I'm glad I finally found a quality bulk option.

Emma ★★★★★

The hot-dip galvanized coating looks really even and thick, so I'm confident these won't rust out on my trailer hitch project. The unthreaded grip section made aligning the bolt through the steel bracket much easier than dealing with a fully threaded one.

David ★★★★★

I needed a full box of these for a deck rebuild and the partially threaded shank saved me from having to use extra washers to get a snug fit. The hex heads grabbed perfectly with a socket wrench, and the hot-dip galvanizing looks tough enough to handle the elements.