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Home / Screws / 304 Stainless Steel Hex Socket Captive Screws, Non-Loosening Screws, Non-Ejecting Partial Thread Bolts M3 M4 M5 M6 M8mm

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Hex Socket (Allen)
Thread Type Partial Thread, Coarse
Feature Captive/Non-Ejecting Design
Available Sizes M3, M4, M5, M6, M8
Finish Polished Silver
Drive Size Metric Hex Key Required
Application Electronics, Machinery, Enclosures
Corrosion Resistance High (Indoor & Outdoor)
Package Content Assorted Kit with Storage Box

6 reviews

A

Anonymous

Mar 20, 2026

Rating: 5/5

Professional grade fasteners

Using these for industrial equipment panels. They hold up well against vibration and the non-loosening feature is genuine.

A

Anonymous

Mar 14, 2026

Rating: 5/5

No more lost screws!

The captive design works perfectly. Even when fully unscrewed, the bolt stays attached to the panel. Saves so much time during maintenance.

A

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for server rack assembly

These captive screws are a lifesaver. The non-ejecting feature means I don't drop screws inside the chassis anymore. The 304 steel feels very durable.

A

Anonymous

Mar 10, 2026

Rating: 4/5

Good quality, slightly stiff at first

The build quality is excellent. They were a bit tight to turn initially but loosened up after a few uses. Great value for the price.

A

Anonymous

Mar 07, 2026

Rating: 4/5

Solid hardware

Good stainless steel quality. I wish the kit came with a small Allen key included, but otherwise, no complaints.

A

Anonymous

Mar 01, 2026

Rating: 5/5

Exactly what I needed for my CNC project

Ordered the M5 size. Threads are clean and the hex socket hasn't stripped even after multiple installations. Highly recommend.

5 FAQ

Q: Can I get a VAT invoice for this purchase?

A: Yes, as mentioned in the product description, we provide a 13% VAT invoice. Please request it during checkout or contact us after purchase.

Q: What is the length of the threaded portion on the M4 screws?

A: For the M4 size in this series, the partial thread length is approximately 10mm, while the unthreaded shank allows for the captive mechanism to function.

Q: Is the M8 size suitable for outdoor electrical boxes?

A: Yes, since these are made from 304 Stainless Steel, they offer high corrosion resistance and are suitable for most outdoor applications.

Q: Will these fit standard metric threaded holes?

A: Absolutely. These screws adhere to standard metric threading specifications for M3 through M8 sizes and will fit corresponding tapped holes.

Q: Do these screws come with the matching Allen keys?

A: No, the package contains only the screws. You will need to use your own metric hex key set appropriate for the screw size you selected.

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