Mutual Screw & Supply

5/16-18 X 4" Machine Screws | Flat Head Phillips Drive | 18/8 Stainless Steel (100 / Pkg.)

5/16-18 X 4" Machine Screws | Flat Head Phillips Drive | 18/8 Stainless Steel - Main image
$58.48 $82.37 In stock

18/8 (304) stainless steel machine screw offering strong corrosion resistance for indoor, outdoor, and washdown environments. Non-magnetic.

Specs

  • Dimensions: 5/16-18 4"
  • Drive type: Phillips
  • Head style: Flat Head
  • Material: 18/8 Stainless Steel
  • Thread: 5/16-18 UNC (coarse)

Features

  • Machine-thread screws for use with nuts or tapped holes
  • Flat head profile
  • Phillips drive
  • 18/8 Stainless Steel construction
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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 (4.8 / 5 · 5 reviews)

Ryan ★★★★★

Picked up a pack of these for a deck repair project, and the flat head sits flush perfectly. The 18/8 stainless seems solid and the threads were clean right out of the box.

Andrew Q. ★★★★★

These threads are clean and straight, no burs or wobble when I seat them. The 304 stainless makes them a no-brainer for the washdown area I'm building, and the 4" length gives plenty of grip.

Hannah ★★★★★

Had to order these for a project that needed extra length, and the 4-inch size was perfect for going through thick brackets. The threads are clean and the Phillips head drives in without stripping. Solid 304 stainless, no rust worries even outside.