Mutual Screw & Supply

5/16-18 X 5/8" Hex Machine Bolts | 18/8 Stainless Steel | Fully Threaded (90 / Pkg.)

5/16-18 X 5/8" Hex Machine Bolts | 18/8 Stainless Steel | Fully Threaded (90 / - Main image
$6.5 $10 In stock

5/16-18 X 5/8" Hex Machine Bolts in 18/8 Stainless Steel. A fully threaded hex head machine bolt for use where thread engagement is needed along the entire shank, in metal, wood, and assembled components.

  • Fully threaded for full-length engagement
  • 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: 5/8"
  • Thread: Fully 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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Delivery costs

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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Returning an item

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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 (5.0 / 5 · 5 reviews)

James ★★★★★

The fully threaded shank made all the difference for my metal brackets—no wasted smooth section, just solid bite the whole way. The stainless finish looks clean and the threads cut smooth without binding. These are going to last a lot longer than the last pack I bought.

Amelia I. ★★★★★

Just swapped out some old zinc bolts for these stainless ones on a trailer gate, and the 18/8 material makes a noticeable difference in rust resistance. The 90-pack is more than enough to finish the job and have spares left over.

Aurora Q. ★★★★★

The fully threaded length is a lifesaver when you’re bolting through uneven stacked brackets—no more hunting for washers to fill the gap. These 18/8 stainless hex heads came out of the package clean and turned smoothly in tight spots. I’ve already used half the bag on a trailer repair and they’re ho