M3 Screw Kit 420pcs CARLWIN Premium Socket Head Screws Black

Description

Product Overview

The CARLWIN 420pcs M3 Screw Kit is engineered for precision and durability, featuring 12.9 grade alloy steel screws finished with a black oxide coating that resists corrosion and wear. The assortment includes seven popular lengths—6mm, 8mm, 10mm, 12mm, 16mm, 20mm, and 25mm—each supplied in a count of 20, delivering a total of 140 high‑quality screws. Packaged in a compact, reusable plastic storage box, the kit ensures organized access and protects components from loss or damage. The hex socket head design aligns with standard hex wrenches, enabling quick and secure fastening in a variety of applications.

Usage

Designed for versatility, this screw kit excels in 3D printing projects where precise thread engagement is critical, as well as in woodworking, machinery repair, and general DIY tasks. Whether assembling printer frames, repairing electronic enclosures, or constructing custom fixtures, the M3 screws provide reliable strength and a clean finish. Hobbyists, engineers, and makers alike benefit from the comprehensive size range, allowing seamless integration into prototypes, repairs, and creative builds. The included storage box simplifies inventory management for workshops, labs, and home garages.

Why Choose Us

CARLWIN’s commitment to quality is reflected in the use of premium 12.9 alloy steel and a meticulous black oxide treatment, guaranteeing superior tensile strength and longevity. Each screw undergoes strict dimensional testing to meet industry standards, ensuring consistent performance across all sizes. The kit’s organized packaging reduces downtime by keeping the right screw at hand, while the hex socket head design minimizes tool slippage and enhances user safety. Backed by a responsive customer support team, we provide assistance for any technical queries or replacement needs, reinforcing confidence in every purchase.

Key Features

• Premium 12.9 alloy steel construction delivers high tensile strength for demanding tasks.
• Black oxide finish provides corrosion resistance and a sleek, professional appearance.
• Seven essential M3 lengths (6‑25mm) cover a wide range of applications.
• Hex socket head design enables fast, secure tightening with standard hex wrenches.
• Durable plastic storage box ensures organized, easy access and protects components.
• Comprehensive 420‑piece count reduces the need for multiple purchases.
• Responsive customer support offers guidance and replacement assistance.

FAQ

What material are the screws made from?

All screws are fabricated from 12.9 grade alloy steel, offering excellent strength and durability.

Do the screws come with a storage solution?

Yes, the kit includes a sturdy plastic storage box that keeps all screws organized and protected.

Can these screws be used for 3D printer assembly?

Absolutely. The M3 sizes are ideal for assembling and repairing 3D printer frames and components.

Is the black oxide coating resistant to rust?

The black oxide finish provides significant corrosion resistance, extending the lifespan of each screw.

What tools are needed to install these screws?

A standard hex wrench or Allen key that matches the socket size is sufficient for installation.