Mutual Screw & Supply

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

5/16-18 X 4" Machine Screws | Oval Head Phillips Drive | 18/8 Stainless Steel - Main image
$46.72 $70.79 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: Oval Head
  • Material: 18/8 Stainless Steel
  • Thread: 5/16-18 UNC (coarse)

Features

  • Machine-thread screws for use with nuts or tapped holes
  • Oval 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 (5.0 / 5 · 5 reviews)

Matthew S. ★★★★★

Used a handful to mount some outdoor shelving brackets, and not a single one stripped during driving. The 4-inch length gave plenty of bite into the studs, and the stainless finish is holding up well in the rain so far.

Sofia ★★★★★

I needed extra length for a custom metal shelf project, and these 4-inch screws grabbed the threads perfectly without stripping. The oval head sits flush on the surface, and the 18/8 stainless gives me peace of mind for occasional outdoor use.

Adam ★★★★★

The Phillips head on these 4-inch stainless screws drives smoothly without stripping, which is a relief when you’re working in tight spaces. Used a dozen of them to secure a metal bracket outdoors, and the corrosion resistance seems solid so far.