Mutual Screw & Supply

5/16-18 X 1-1/8" Machine Screws | Round Head Slotted Drive | Steel Zinc Plated (200 / Pkg.)

5/16-18 X 1-1/8" Machine Screws | Round Head Slotted Drive | Steel Zinc Plated - Main image
$37.09 $53.76 In stock

Zinc-plated steel machine screw for general-purpose fastening. The zinc coating adds corrosion resistance for indoor and light outdoor use.

Specs

  • Dimensions: 5/16-18 1-1/8"
  • Drive type: Slotted
  • Head style: Round Head
  • Material: Steel Zinc Plated
  • Thread: 5/16-18 UNC (coarse)

Features

  • Machine-thread screws for use with nuts or tapped holes
  • Round head profile
  • Slotted drive
  • Steel Zinc Plated construction
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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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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)

Riley D. ★★★★★

The slotted heads seat a flathead screwdriver perfectly, no cam-out even when I torqued them down on a metal bracket. The zinc finish looks uniform and clean, and 200 pieces in a threaded box means I won't run out mid-project.

Matthew M. ★★★★★

Picked up a pack of these for a furniture repair project and I'm impressed with the consistent threading—each screw threaded smoothly into predrilled holes with no binding. The slotted heads give them a classic look that blends well with older hardware.

Violet ★★★★★

The slot on these screws is cut clean and deep, so a standard flathead driver bites without slipping. I used them to mount a steel bracket to a wooden frame, and the zinc coating held up fine against a few humid days.