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Home / Screws / 304 Stainless Steel Cylinder Head Socket Head Cap Screws Cup Head Bolts Extended Length Screws M1.4 M3 M4 M5 M16

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Socket Head Cap (Cup Head)
Drive Type Hex Socket (Allen)
Thread Standard Metric Coarse
Available Sizes M1.4, M3, M4, M5, M16
Finish Polished Silver
Corrosion Resistance High (Suitable for Damp Environments)
Tensile Strength Standard Industrial Grade
Application Machinery, Electronics, Furniture Assembly
Package Type Bulk Box or Individual Packs

6 reviews

A

Anonymous

Mar 30, 2026

Rating: 4/5

Good quality, fast shipping

Ordered a mix of M3 and M4 sizes. Quality is consistent across the batch. One screw had a slightly rough thread start, but it tightened fine.

A

Anonymous

Mar 24, 2026

Rating: 3/5

Decent but check your lengths

The material is good, but make sure you double-check the length specifications before ordering. I accidentally ordered standard length instead of extended.

A

Anonymous

Mar 24, 2026

Rating: 5/5

Great for outdoor fixtures

Using these for a garden trellis assembly. The corrosion resistance seems excellent so far after a few weeks of rain. Will buy again.

A

Anonymous

Mar 23, 2026

Rating: 5/5

Excellent value for bulk

Bought the M16 size for a heavy-duty frame. Very strong and the price per unit was much better than local hardware stores.

A

Anonymous

Mar 22, 2026

Rating: 5/5

Perfect fit for my CNC project

These M5 extended length screws are exactly what I needed. The 304 stainless steel feels solid and the hex socket is deep enough to prevent stripping.

A

Anonymous

Mar 06, 2026

Rating: 5/5

Reliable supplier

This is my third repeat purchase. The door-to-door delivery is always on time, and the packaging keeps the small M1.4 screws from getting lost.

5 FAQ

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

A: No, the screws are sold separately. We recommend using a standard metric hex key set compatible with the specific size you order.

Q: Can these be used in marine environments?

A: While 304 Stainless Steel offers good corrosion resistance, 316 Stainless Steel is generally recommended for direct saltwater exposure. These are suitable for damp indoor or coastal air conditions.

Q: What is the lead time for bulk orders over 5000 units?

A: For orders exceeding 5000 units, please contact our sales team directly. Standard stock items usually ship within 24-48 hours.

Q: Are the threads rolled or cut?

A: Our socket head cap screws feature rolled threads, which provide greater strength and smoother engagement compared to cut threads.

Q: Is the M1.4 size suitable for plastic electronics housings?

A: Yes, the M1.4 size is commonly used for small electronics. However, please ensure you do not overtighten to avoid cracking the plastic.

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