Skip to main content
Home / Screws / Hardened Blue-White Zinc Plated Large Flat Head Self-Tapping Screw High-Strength Cross Wood Screw M3 M4 M5 M6

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material Carbon Steel
Surface Treatment Blue-White Zinc Plated
Head Style Flat Head (Countersunk)
Drive Type Cross (Phillips)
Thread Type Self-Tapping
Available Sizes M3, M4, M5, M6
Hardness Grade High-Strength Hardened
Application Wood, Plastic, Thin Metal
Color Silver with Blue-White Tint
Package Type Bulk Box or Retail Pack

6 reviews

A

Anonymous

Mar 28, 2026

Rating: 5/5

Excellent quality for woodworking projects

These screws are incredibly sharp and drive smoothly into hardwood without pre-drilling in most cases. The zinc plating looks durable and should resist rust well in my workshop environment.

A

Anonymous

Mar 21, 2026

Rating: 5/5

Perfect for delicate woodwork

The self-tapping feature works wonderfully on softwoods like pine. No splitting occurred, which was my main concern. Highly recommend for hobbyists.

A

Anonymous

Mar 20, 2026

Rating: 4/5

Great value, strong hold

Bought the M4 size for assembling furniture. They hold very tightly and the flat head sits perfectly flush. One star off because a couple in the box had slightly stripped heads, but overall great value.

A

Anonymous

Mar 16, 2026

Rating: 4/5

Solid screws, fast shipping

Good strength and the cross drive engages well. I used them for decking subframes. They seem robust enough for structural applications indoors.

A

Anonymous

Mar 15, 2026

Rating: 5/5

Professional grade fasteners

I use these daily for cabinetry. The hardened steel prevents snapping even under high torque from my impact driver. The blue-white finish is consistent across the batch.

A

Anonymous

Mar 11, 2026

Rating: 5/5

Exactly what I needed

Replaced some old rusty screws on my garden shed door with these M5 ones. They look clean, fit perfectly, and were easy to install with a standard screwdriver.

5 FAQ

Q: Do you sell these in individual sizes or only mixed kits?

A: We offer both options. You can purchase boxes containing a single specific size (e.g., only M4) or choose our variety kit that includes an assortment of M3 through M6 screws.

Q: What is the thread pitch for the M6 size?

A: The M6 screws feature a standard coarse thread pitch of 1.0mm, which is ideal for quick insertion and strong holding power in wood and plastic materials.

Q: Do these screws require pre-drilling for oak wood?

A: For hard woods like oak, we recommend pre-drilling a pilot hole slightly smaller than the screw diameter to prevent splitting and ensure easier driving, although the self-tapping design helps significantly.

Q: Are these suitable for outdoor use?

A: While the blue-white zinc plating offers good corrosion resistance, these are best suited for indoor applications. For prolonged outdoor exposure, we suggest our stainless steel or hot-dip galvanized series.

Q: Can I use these with an electric impact driver?

A: Yes, these screws are hardened and designed to withstand the torque of electric impact drivers. However, please ensure your driver is set to the appropriate clutch setting to avoid over-driving.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
PISEN Desktop Cable Organizer - Magnetic Data Cord Manager, Soft Silicone Fixed Wire Winder with Adhesive Clips, Mini Portable Hub

PISEN Desktop Cable Organizer - Magnetic Data Cord Manager, Soft Silicone Fixed Wire Winder with Adhesive Clips, Mini Portable Hub

$10.10

Handcrafted Peach Wood and Sheepskin Rattle with Brass Jingle Stick – Traditional Chewable Wooden Baby Toy

Handcrafted Peach Wood and Sheepskin Rattle with Brass Jingle Stick – Traditional Chewable Wooden Baby Toy

$74.00

DC Drive DCS550-S02-0050-05-00-00

DC Drive DCS550-S02-0050-05-00-00

$10,838.20

Waterproof Storage Bag for Clothes and Bathroom Use, Large-Capacity Drawstring Organizer for Men and Women, Outdoor Travel and Toiletry Pack

Waterproof Storage Bag for Clothes and Bathroom Use, Large-Capacity Drawstring Organizer for Men and Women, Outdoor Travel and Toiletry Pack

$39.90

Steel Speed Bump with Rubber Surface for Cars and Railways

Steel Speed Bump with Rubber Surface for Cars and Railways

$3,668.00

Huaboshi Thickened Resin Vegetable Planter Box – Rectangular Plastic Balcony Grow Container with Drainage Tray

Huaboshi Thickened Resin Vegetable Planter Box – Rectangular Plastic Balcony Grow Container with Drainage Tray

$45.99

New Data Cable Storage Bag Travel Digital Charger Cord Organizer Protective Visible Multi-Use Portable Case

New Data Cable Storage Bag Travel Digital Charger Cord Organizer Protective Visible Multi-Use Portable Case

$1.64

Press Wash Blade for KBA Printing Presses - Model KBA105 Ink Scraper, 1160*40mm

Press Wash Blade for KBA Printing Presses - Model KBA105 Ink Scraper, 1160*40mm

$40.50

Genuine Pirelli Run-Flat Car Tire P7 225 245 275 285/35 40 45 R18 19 20 21

Genuine Pirelli Run-Flat Car Tire P7 225 245 275 285/35 40 45 R18 19 20 21

$336.00

Chuangshidai 100XP Compact Desktop Fume Extractor for Soldering Irons - Rapid Smoke Purification

Chuangshidai 100XP Compact Desktop Fume Extractor for Soldering Irons - Rapid Smoke Purification

$696.00

Multi-Function Kitchen Sink Rack - Dish Drying Organizer for Bowls and Plates

Multi-Function Kitchen Sink Rack - Dish Drying Organizer for Bowls and Plates

$33.10

Water Brush Kids Water Painting Book Graffiti Special Pen Water Sketchbook Eco-Friendly Safe Tap Water Refillable Pen Set

Water Brush Kids Water Painting Book Graffiti Special Pen Water Sketchbook Eco-Friendly Safe Tap Water Refillable Pen Set

$2.16

No-Drill Over-Toilet Storage Rack for Bathroom Restroom Organizer

No-Drill Over-Toilet Storage Rack for Bathroom Restroom Organizer

$8.90

Jingdezhen Blue and White Porcelain Antique Brush Washer, Traditional Chinese Painting Calligraphy Brush Rinse Basin, Large and Small Water Pots

Jingdezhen Blue and White Porcelain Antique Brush Washer, Traditional Chinese Painting Calligraphy Brush Rinse Basin, Large and Small Water Pots

$16.90

Sketch Blending Stump Set for Art Students - Highlight Detail Shadow Tool Kit with Replacement Sponge Heads for Beginners

Sketch Blending Stump Set for Art Students - Highlight Detail Shadow Tool Kit with Replacement Sponge Heads for Beginners

$9.00

Changyiyou Outdoor Large-Capacity Wheeled Duffel Bag - Thickened Storage Backpack with Wheels for Camping Gear and Travel

Changyiyou Outdoor Large-Capacity Wheeled Duffel Bag - Thickened Storage Backpack with Wheels for Camping Gear and Travel

$109.00

Lightweight Waterproof Dry Bag for River Trekking and Rafting – Travel Storage for Clothes, Shoes, Socks with Moisture-Proof Buckle, Roll-Top Carry Design

Lightweight Waterproof Dry Bag for River Trekking and Rafting – Travel Storage for Clothes, Shoes, Socks with Moisture-Proof Buckle, Roll-Top Carry Design

$15.80

Tupai 3D Self-Adhesive Wall Stickers, Custom Acrylic Logo Advertising Letters for Signage, Background Walls, and Image Wall Decor

Tupai 3D Self-Adhesive Wall Stickers, Custom Acrylic Logo Advertising Letters for Signage, Background Walls, and Image Wall Decor

$8.50

Durable Replacement DEUBLIN 525/357 Water Inlet/Outlet Rotary Union for Curved Surface Printing and Cup Printing Machines

Durable Replacement DEUBLIN 525/357 Water Inlet/Outlet Rotary Union for Curved Surface Printing and Cup Printing Machines

$300.00

Detachable Large Water Barrel Rack for Mineral and Purified Water, Office Bottled Water Storage Stand with Wheels

Detachable Large Water Barrel Rack for Mineral and Purified Water, Office Bottled Water Storage Stand with Wheels

$136.00

Tea Packaging Gift Box - Empty Ceramic Tea Canister for Longjing, Green Tea, White Tea, Ripe Pu'er, Universal Packaging

Tea Packaging Gift Box - Empty Ceramic Tea Canister for Longjing, Green Tea, White Tea, Ripe Pu'er, Universal Packaging

$68.00

Ruke Floating Skimmer Machine for Sewage Treatment Plant Biochemical Tanks

Ruke Floating Skimmer Machine for Sewage Treatment Plant Biochemical Tanks

$12,064.00

Car Tire Stone Removal Tool Rock Picker Anti-Explosion Hook Stone Cleaner Car Hook Window Breaker Hammer

Car Tire Stone Removal Tool Rock Picker Anti-Explosion Hook Stone Cleaner Car Hook Window Breaker Hammer

$2.07

Negotiable Price: Siemens 10mA Leakage Circuit Breaker, 2P 16A Ground Fault Protection

Negotiable Price: Siemens 10mA Leakage Circuit Breaker, 2P 16A Ground Fault Protection

$130.00

Jingdezhen Ceramic Brush Washer Set, Blue and White Porcelain Calligraphy Ink Well and Pen Holder

Jingdezhen Ceramic Brush Washer Set, Blue and White Porcelain Calligraphy Ink Well and Pen Holder

$14.99

Beishanlang Outdoor Camping Foldable Lighting Stand Aluminum Alloy Portable Lamp Pole Bracket Camp Light Night Fishing Light

Beishanlang Outdoor Camping Foldable Lighting Stand Aluminum Alloy Portable Lamp Pole Bracket Camp Light Night Fishing Light

$49.00

Mobile Gas Cylinder Stand with Wheels - Plastic Base Tray for Propane Tanks and Water Buckets

Mobile Gas Cylinder Stand with Wheels - Plastic Base Tray for Propane Tanks and Water Buckets

$10.65

Fast Grocery Shopping Cart, Foldable Portable Home Trolley with Stair-Climbing Wheels, Lightweight Hand Truck for Seniors

Fast Grocery Shopping Cart, Foldable Portable Home Trolley with Stair-Climbing Wheels, Lightweight Hand Truck for Seniors

$299.06

Car Tire Stone Hook - Multi-Function Rust-Resistant Tool for Removing Stones from Tires

Car Tire Stone Hook - Multi-Function Rust-Resistant Tool for Removing Stones from Tires

$8.33

Zunjue 100% Cotton Watercolor Paper Mini Portable Pocket Sketchbook for Travel, 300g Cold Press Thickened Art Notebook for Gouache, Oil Pastel, and Colored Pencil

Zunjue 100% Cotton Watercolor Paper Mini Portable Pocket Sketchbook for Travel, 300g Cold Press Thickened Art Notebook for Gouache, Oil Pastel, and Colored Pencil

$3.32