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Early Access 4-40x9/16 3/16 Hex Jackscrew Male 300 Series Stainless Steel Save Big: 85% Off [mXLTIrPn]

$50.99 $163.99 -69%

4-40X9/16 3/16 Hex Jackscrew Male 300 Series Stainless Steel is a type of screw that is used to fasten two pieces of material together. It has a male thread on the outside and a hex head on the top. The hex head allows the screw to be tightened or lo

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Early Access 4-40x9/16 3/16 Hex Jackscrew Male 300 Series Stainless Steel Save Big: 85% Off [mXLTIrPn]

4-40X9/16 3/16 Hex Jackscrew Male 300 Series Stainless Steel is a type of screw that is used to fasten two pieces of material together. It has a male thread on the outside and a hex head on the top. The hex head allows the screw to be tightened or loosened with a hex key. The 4-40 refers to the diameter and thread pitch of the screw. The 9/16 refers to the length of the screw. The 3/16 refers to the size of the hex head. The 300 Series Stainless Steel refers to the material that the screw is made of.

What Our Customers Say

January 25, 2026

Absolutely no complaints!

The performance is truly quite exceptional.

- Greyson G..

January 25, 2026

Absolutely no complaints!

It's a very solid, and a very, very nice product.

- Evelyn F..

January 25, 2026

Absolutely no complaints!

This has become a cornerstone of my kit.

- Isaac T..

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