Mutual Screw & Supply

1/4-20 X 3-1/4" Hex Machine Bolts | 18/8 Stainless Steel | Partially Threaded (50 / Pkg.)

1/4-20 X 3-1/4" Hex Machine Bolts | 18/8 Stainless Steel | Partially Threaded - Main image
$8.63 $12.5 In stock

1/4-20 X 3-1/4" Hex Machine Bolts in 18/8 Stainless Steel. 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
  • Stainless steel for superior corrosion resistance

Specifications

  • Type: Hex Machine Bolts
  • Head Style: Hex
  • Material: 18/8 Stainless Steel
  • Finish: Plain
  • Thread Size: 1/4-20
  • Length: 3-1/4"
  • Thread: Partially Threaded
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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (3.8 / 5 · 5 reviews)

Aurora R. ★★★★★

I needed a proper grip length for a metal frame I was assembling, and these 3-1/4" bolts fit perfectly through heavy tubing without the threads binding halfway. The 18/8 stainless should resist rust well outdoors.

Sebastian G. ★★★★★

The partially threaded shank on these bolts made aligning everything much easier, since the unthreaded grip section held the joint steady before I torqued them down. They're solid 18/8 stainless, so no worries about rust on my outdoor gate project. Pack of 50 is plenty for a few jobs.

Robert T. ★★★☆☆

The threads are clean and the stainless steel feels solid enough for my outdoor project. They did the job, but the partial thread on a few bolts was slightly shorter than the spec I needed, so I had to swap some out.