Mutual Screw & Supply

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

5/16-18 X 5" Machine Screws | Flat Head Slotted Drive | 18/8 Stainless Steel - Main image
$107.35 $167.73 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 5"
  • Drive type: Slotted
  • 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
  • Slotted drive
  • 18/8 Stainless Steel construction
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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)

Stella ★★★★★

The flat head sits flush and clean in the counterbore I drilled, and the slotted drive worked fine with a standard screwdriver. I’ve had trouble with cheaper stainless stripping before, but these 18/8 screws felt solid threading into steel. Exactly what I needed for an outdoor railing repair.

Alexander Q. ★★★★★

These 5-inch machine screws held up perfectly when I used them to fasten a heavy gate latch outdoors. The 18/8 stainless steel is definitely corrosion-resistant, and the slotted drive gave me solid grip with my flathead bit.

Henry ★★★★★

The slotted heads on these screws are cut deep and clean, so a standard driver bit gets solid purchase without camming out, and the 5-inch length handles really thick brackets with room to spare.