Mutual Screw & Supply

#4-40 X 5/16" Machine Screws | Flat 100° Head Slotted Drive | 18/8 Stainless Steel (1000 / Pkg.)

#4-40 X 5/16" Machine Screws | Flat 100° Head Slotted Drive | 18/8 Stainless - Main image
$10.98 $18 In stock

These #4-40 x 5/16" machine screws are manufactured from 18/8 Stainless Steel, featuring a slotted drive and a flat 100 head. They are well suited to fastening metal parts, panels, and enclosures.

  • Material and finish: 18/8 Stainless Steel
  • Drive: Slotted
  • Head style: Flat 100
  • Thread size: #4-40
  • Length: 5/16"
  • Applications: Fastening metal parts, panels, and enclosures

Specifications

  • Product type: Machine Screws
  • Material: 18/8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Head style: Flat 100
  • Drive type: Slotted
  • Thread size: #4-40
  • Length: 5/16"
  • Threads per inch: 40
  • Measurement type: Imperial
  • Pack quantity: 1000 per package

Please note: This item is excess stock and is sold non-cancelable, non-refundable, and non-returnable. Please call us with any questions about this item before ordering.

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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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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 N. ★★★★★

The 100° flat head sits perfectly flush in my aluminum enclosures, and the 5/16" length is just right for thin panel work. I’ve already burned through half the box on a single project.

Violet O. ★★★★★

Exactly the right size for mounting small circuit boards inside aluminum enclosures – the slotted drive makes them easy to seat without stripping. The 100° flat head sits flush perfectly, and stainless steel means no rust worries in a slightly humid workshop.

Hazel ★★★★★

Picked up a 1000-count pack of these #4-40 x 5/16" stainless screws for a panel project, and the 100° flat head sits perfectly flush in the countersunk holes. The 18/8 material gives me confidence they won't rust out, even in a slightly damp workshop.