Mutual Screw & Supply

3/8-16 X 3-1/2" Hex Machine Bolts | 18/8 Stainless Steel | Partially Threaded (50 / Pkg.)

3/8-16 X 3-1/2" Hex Machine Bolts | 18/8 Stainless Steel | Partially Threaded - Main image
$13.23 $21 In stock

3/8-16 X 3-1/2" 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: 3/8-16
  • Length: 3-1/2"
  • Thread: Partially Threaded
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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 (4.6 / 5 · 5 reviews)

Nicholas U. ★★★★★

These bolts cinched up tight with no wobble once the unthreaded grip portion seated, and the 18/8 stainless finish looks clean. Fifty in the pack means I’ve got plenty left for the next project.

Victoria ★★★★★

Needed some bolts with a clean grip section for a machine base I was building, and these stainless ones fit perfectly. The threading was crisp and consistent across all 50 pieces, no burs to clean up.

Victoria M. ★★★★★

The bag of 50 arrived with all threads cleanly cut and no burrs, which saved me a trip to the hardware store for a die. The stainless steel heads have a nice brushed look that won’t rust on my outdoor gate project, and the partial threading gave me just the right grip length for the bracket.