Mutual Screw & Supply

1"-8 X 3-1/4" Heavy Hex Cap Screws | ASTM A193 B7 Alloy Steel Plain | Partially Threaded (40 / Pkg.)

1"-8 X 3-1/4" Heavy Hex Cap Screws | ASTM A193 B7 Alloy Steel Plain | Partially - Main image
$115.52 $158.24 In stock

ASTM A193 B7 Alloy Steel Plain hex head cap screws, partially threaded, size 1"-8 x 3-1/4". A dependable fastener for machinery, equipment assembly, and general industrial use.

  • ASTM A193 B7 Alloy Steel Plain construction
  • partially threaded configuration
  • Hex head for wrench or socket drive
  • For machinery, equipment, and general-purpose fastening

Specifications

  • Thread Size: 1-8
  • Length: 3-1/4"
  • Threads Per Inch: 8
  • Material: ASTM A193 B7 Alloy Steel Plain
  • Finish: Plain
  • Thread Style: Partially Threaded
  • Pack Quantity: 40
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)

Elizabeth ★★★★★

Used a couple of these to secure a heavy-duty pump base at the plant, and the 1"-8 threads cut cleanly into the tapped holes with no binding. The partially threaded design gave just the right clamp load for the flange. Solid hold.

Avery P. ★★★★★

Used these on a large press rebuild and the partial threading made alignment much easier than fully threaded bolts. The alloy steel feels plenty tough for the load.

Chloe ★★★★★

The 1"-8 threads seated perfectly on our flange bolts, and the partial threading made alignment a lot easier than dealing with fully threaded rods. The alloy steel finish feels dense and solid, and all 40 pieces came without any burrs or bent threads.