Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Screws
Origin	-
Material	Carbon Steel with Nickel Plating
Finish	Black Oxide / Nickel Plated
Head Style	Knurled Step Head
Drive Type	Hand-Tightening (Tool-Free)
Available Sizes	M3, M4, M5, M6
Thread Pitch	Standard Metric Coarse
Application	Micro-adjustment and Manual Fastening
Corrosion Resistance	Moderate (Indoor Use Recommended)
Package Contents	Assorted Kit (20 Pieces)
Country of Origin	China

6 reviews

Anonymous

Mar 20, 2026

Rating: 5/5

Sturdy and reliable

Bought these for laboratory equipment mounts. They hold their position well under vibration. The black micro-adjustment screw design is both functional and aesthetically pleasing.

Anonymous

Mar 17, 2026

Rating: 4/5

Good quality, slight size variance

Overall very satisfied with the purchase. The nickel plating seems durable. I noticed the M4 screws were slightly tighter than expected, but they still work well for manual fastening applications.

Anonymous

Mar 16, 2026

Rating: 5/5

Great for DIY projects

I used these on a custom camera rig. The step design allows for precise depth control, and the hand-tightening feature saves time when swapping lenses. Highly recommend for hobbyists.

Anonymous

Mar 10, 2026

Rating: 3/5

Decent but not for heavy load

They work fine for light-duty applications like securing panels or covers. However, I wouldn't trust them for anything bearing significant weight since they are designed for hand-tightening only.

Anonymous

Mar 10, 2026

Rating: 5/5

Perfect for quick adjustments

These screws are exactly what I needed for my 3D printer bed leveling. The knurled head provides excellent grip, and the black finish looks professional. No tools required makes adjustments a breeze.

Anonymous

Mar 07, 2026

Rating: 5/5

Excellent value pack

Having M3 through M6 in one kit is incredibly convenient. The knurling is sharp enough to grip easily but smooth enough not to hurt fingers. Will definitely buy again.

5 FAQ

Q: Are these screws compatible with standard metric nuts?

A: Yes, these screws feature standard metric coarse threads and are fully compatible with corresponding M3, M4, M5, and M6 nuts.

Q: Can these be used outdoors?

A: While they have a nickel-plated finish offering some protection, they are best suited for indoor environments. Prolonged exposure to moisture may cause corrosion over time.

Q: Do I need any special tools to install these?

A: No special tools are required. The knurled head is specifically designed for tool-free, hand-tightening installation and adjustment.

Q: Is the black finish paint or an oxide coating?

A: The black finish is achieved through a black oxide treatment, which provides a matte look and mild corrosion resistance without chipping like paint.

Q: What is the height of the step on the screw head?

A: The step height varies slightly by size, but generally ranges from 2mm to 3mm, designed to provide a stable shoulder for micro-adjustments.

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