Mutual Screw & Supply

5/16-18 X 1-1/8" Hex Machine Bolts | 18/8 Stainless Steel | Partially Threaded (200 / Pkg.)

5/16-18 X 1-1/8" Hex Machine Bolts | 18/8 Stainless Steel | Partially Threaded - Main image
$126.12 $177.63 In stock

5/16-18 X 1-1/8" 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: 5/16-18
  • Length: 1-1/8"
  • Thread: Partially Threaded
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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)

Joshua ★★★★★

Needed some stainless bolts for a marine project where corrosion resistance is key, and the 18/8 grade on these is exactly what I was after. The 1-1/8" length with that unthreaded grip portion lined up perfectly with the bracket thickness I'm working with.

Benjamin Z. ★★★★★

The partially threaded shank gave me that solid grip length I needed for a snug fit through the frame and plate, and they held up fine outside in the rain for a week now. Pack of 200 is plenty, and the hex heads seated cleanly with a standard wrench without any stripping.

Aurora ★★★★★

The stainless steel finish on these has held up great in a damp shed for two months now—no rust at all. The unthreaded shank made alignment a breeze when assembling a metal frame.