Skip to main content
Home / Screws / 304 Stainless Steel Flat Head Cross Recessed Countersunk Self-Tapping Screws, Extended Length, National Standard Fasteners M3 M4 M5 M6 M8

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Flat Head Countersunk
Drive Type Cross Recessed (Phillips)
Thread Type Self-Tapping
Available Sizes M3, M4, M5, M6, M8
Standard National Standard Fasteners
Finish Polished Silver
Length Type Extended Length Options
Corrosion Resistance High (Suitable for Outdoor Use)
Application Metal, Wood, and Plastic Assembly

6 reviews

A

Anonymous

Mar 24, 2026

Rating: 5/5

Perfect for outdoor projects

These stainless steel screws are exactly what I needed for my deck repair. The countersunk head sits flush, and the material feels very durable against the elements.

A

Anonymous

Mar 16, 2026

Rating: 4/5

Good quality, slightly hard to drive

The build quality is excellent and they look great. However, driving them into hardwood required a bit more torque than expected. Still, no stripping occurred.

A

Anonymous

Mar 16, 2026

Rating: 5/5

Rust-free after months of use

Installed these on a garden gate six months ago. Despite rain and humidity, there is absolutely no sign of rust. Highly recommend for exterior applications.

A

Anonymous

Mar 14, 2026

Rating: 5/5

Professional grade fasteners

As a contractor, I go through a lot of screws. These 304 stainless ones are consistent in thread quality and head shape. Will definitely buy again.

A

Anonymous

Mar 13, 2026

Rating: 5/5

Great variety of sizes

I ordered a mix of M4 and M6 sizes. Having extended length options available made it easy to find the right fit for my thicker metal brackets.

A

Anonymous

Mar 08, 2026

Rating: 3/5

Decent but packaging could be better

The screws themselves are fine and meet the description. However, the small sizes were all mixed together in the bag, making sorting a bit tedious.

5 FAQ

Q: Are these screws suitable for marine environments?

A: While 304 stainless steel offers good corrosion resistance, for constant submersion or highly saline marine environments, we typically recommend 316 stainless steel for superior protection.

Q: Do these come with matching nuts?

A: No, this product listing is for self-tapping screws only, which create their own threads in the material. Nuts are not required for installation nor included in the package.

Q: Can I use these on aluminum sheets without galvanic corrosion?

A: Stainless steel can cause galvanic corrosion when in direct contact with aluminum in wet conditions. We suggest using a barrier sealant or choosing aluminum fasteners for that specific application.

Q: What driver size do I need for the M6 screws?

A: For the M6 cross recessed screws, a standard PH2 (Phillips #2) driver bit is usually the best fit to prevent cam-out and ensure proper torque.

Q: Is the thread full length or partial?

A: These self-tapping screws feature a full thread length design, maximizing grip and holding power throughout the entire shaft of the screw.

Explore your interests

View More
All Categories
Best Seller (30)
New List (30)
Multi-Layer Over-Toilet Storage Rack for Bathroom, Drill-Free Floor Stand for Washing Machine and Balcony Organization

Multi-Layer Over-Toilet Storage Rack for Bathroom, Drill-Free Floor Stand for Washing Machine and Balcony Organization

$46.96

Thickened Industrial Scouring Pad Emery Stainless Steel Abrasive Cloth Pot Scrubber Rust Removal and Polishing Wheel

Thickened Industrial Scouring Pad Emery Stainless Steel Abrasive Cloth Pot Scrubber Rust Removal and Polishing Wheel

$7.28

Wall-Mounted Bathroom Toilet Paper Holder and Tissue Dispenser Rack

Wall-Mounted Bathroom Toilet Paper Holder and Tissue Dispenser Rack

$49.00

Arches French Watercolor Paper 300g/640g/850g, Cold/Hot Press, 100% Cotton, Deckled Edge, 2K/4K/8K

Arches French Watercolor Paper 300g/640g/850g, Cold/Hot Press, 100% Cotton, Deckled Edge, 2K/4K/8K

$29.60

Wen Xin Tang Yan Zhenqing Duobao Pagoda Stele Calligraphy Copybook, Tang Regular Script, Adult Beginner Calligraphy Practice Cards

Wen Xin Tang Yan Zhenqing Duobao Pagoda Stele Calligraphy Copybook, Tang Regular Script, Adult Beginner Calligraphy Practice Cards

$49.30

[Shenzhen Best Seller] Premium Wearable Negative Ion Air Purifier - Neck-Hanging Portable Electronic Mask

[Shenzhen Best Seller] Premium Wearable Negative Ion Air Purifier - Neck-Hanging Portable Electronic Mask

$298.00

Teruisi Electric Fruit and Vegetable Slicer, Multifunctional Chopper for Cafeterias and Hotels, Cutter for Green Onions, Chili Peppers, Radishes, and Ginger

Teruisi Electric Fruit and Vegetable Slicer, Multifunctional Chopper for Cafeterias and Hotels, Cutter for Green Onions, Chili Peppers, Radishes, and Ginger

$3,798.00

Waterproof Phone Pouch for Diving, Swimming, Rafting, and Hot Springs, Sealed Underwater Storage Bag with Waist Strap

Waterproof Phone Pouch for Diving, Swimming, Rafting, and Hot Springs, Sealed Underwater Storage Bag with Waist Strap

$12.90

Premium Thick Cardstock Lin Zexu Representative Small Regular Script Infinite Life Sutra Close-Up Copying Calligraphy Copybook Regular Script for Beginners

Premium Thick Cardstock Lin Zexu Representative Small Regular Script Infinite Life Sutra Close-Up Copying Calligraphy Copybook Regular Script for Beginners

$39.80

Zunjue Ticket-style 100% Cotton Watercolor Paper 300g Cold Press for Artists with Deckled Edges

Zunjue Ticket-style 100% Cotton Watercolor Paper 300g Cold Press for Artists with Deckled Edges

$10.20

Kids' 3D Printing Pen – 3D Stereoscopic Drawing Toy for Girls, Perfect Birthday Gift

Kids' 3D Printing Pen – 3D Stereoscopic Drawing Toy for Girls, Perfect Birthday Gift

$104.66

Mifaner Handmade Watercolor Sketchbook – Oil Painting Series Canvas Journal, Travel-Friendly Mini Notebook for Acrylic Markers

Mifaner Handmade Watercolor Sketchbook – Oil Painting Series Canvas Journal, Travel-Friendly Mini Notebook for Acrylic Markers

$16.90

(Sasha Exclusive) Fat Small Card

(Sasha Exclusive) Fat Small Card

$1,399.00

Silicone Faucet Side Drain Mat, Foldable Splash-Proof Pad for Kitchen Sink and Bathroom Washbasin

Silicone Faucet Side Drain Mat, Foldable Splash-Proof Pad for Kitchen Sink and Bathroom Washbasin

$4.93

Breathable Portable Invisible Aligner Case with Lanyard – Durable Hygienic Storage for Orthodontic Retainers and Dentures

Breathable Portable Invisible Aligner Case with Lanyard – Durable Hygienic Storage for Orthodontic Retainers and Dentures

$18.10

Snail-Specific Slug & Snail Killer Scatter-Type Anti-Pest Granules for Vegetable Gardens Slugs Apple Snails Fruit & Vegetable Fields

Snail-Specific Slug & Snail Killer Scatter-Type Anti-Pest Granules for Vegetable Gardens Slugs Apple Snails Fruit & Vegetable Fields

$10.00

Industrial Scouring Pad for Woodworking, Paint Sanding, and Polishing - Ultra-Fine Hand-Tear Sheets

Industrial Scouring Pad for Woodworking, Paint Sanding, and Polishing - Ultra-Fine Hand-Tear Sheets

$135.70

Custom G80 Manganese Steel Lifting Chain - High-Strength Alloy Chain Rigging for Hoisting and Cranes

Custom G80 Manganese Steel Lifting Chain - High-Strength Alloy Chain Rigging for Hoisting and Cranes

$655.00

High-Concentration Oxygen Generator for Aquaculture with High-Pressure Outlet, Ceramic Nano Disc, and Oxygen Dissolution Cone

High-Concentration Oxygen Generator for Aquaculture with High-Pressure Outlet, Ceramic Nano Disc, and Oxygen Dissolution Cone

$50.00

Paint Brush Rinser – Art Supply Cleaning Cup for Brushes, Palettes, and Pigment Washing

Paint Brush Rinser – Art Supply Cleaning Cup for Brushes, Palettes, and Pigment Washing

$21.80

Heidelberg Printing Press Paper Pressure Wheel Screen Printing Roller Felt Wheel Guanghua Beiren Paper Feed Wheel Laminating Machine Brush Wheel

Heidelberg Printing Press Paper Pressure Wheel Screen Printing Roller Felt Wheel Guanghua Beiren Paper Feed Wheel Laminating Machine Brush Wheel

$6.00

Baofeifan Bubble Squeeze Painting Kit for Kids - Foaming Textured Paper, Wood Pulp Cotton DIY 3D Art with Markers

Baofeifan Bubble Squeeze Painting Kit for Kids - Foaming Textured Paper, Wood Pulp Cotton DIY 3D Art with Markers

$10.00

Westwood Portable Retainer Case for Elderly Dentures and Children's Orthodontic Correctors, Storage Box

Westwood Portable Retainer Case for Elderly Dentures and Children's Orthodontic Correctors, Storage Box

$14.20

PELICAN 1510 Protective Safety Case with Trolley - Waterproof Travel Box for Outdoor Photography Gear

PELICAN 1510 Protective Safety Case with Trolley - Waterproof Travel Box for Outdoor Photography Gear

$1,360.00

Haisen [Exclusive Purchase Link] Livestream Link for New Arrivals and Clearance - Incense Sticks, Coil Incense, Agarwood, Sandalwood, Powder, Burners

Haisen [Exclusive Purchase Link] Livestream Link for New Arrivals and Clearance - Incense Sticks, Coil Incense, Agarwood, Sandalwood, Powder, Burners

$13.80

Ultralight Silicone-Coated Waterproof Dry Bag for Outdoor River Trekking, Rafting, Swimming, Beach Use – Wet/Dry Separation Storage for Swimwear and Towels

Ultralight Silicone-Coated Waterproof Dry Bag for Outdoor River Trekking, Rafting, Swimming, Beach Use – Wet/Dry Separation Storage for Swimwear and Towels

$38.20

Food Warmer Cabinet, Room Temperature Commercial Constant-Temperature Display Case, Egg Tart Heating Cabinet, Small Countertop Sample Retention Cabinet, Chestnut, White

Food Warmer Cabinet, Room Temperature Commercial Constant-Temperature Display Case, Egg Tart Heating Cabinet, Small Countertop Sample Retention Cabinet, Chestnut, White

$239.00

Ultra-Narrow 8/9/10cm Bathroom and Kitchen Gap Storage Rack with Wheels

Ultra-Narrow 8/9/10cm Bathroom and Kitchen Gap Storage Rack with Wheels

$15.90

Glow-in-the-Dark 3D Printing Pen for Kids, Low-Temperature Stereoscopic Graffiti Magic Pen, Drawing Toy, Birthday Gift for Girls

Glow-in-the-Dark 3D Printing Pen for Kids, Low-Temperature Stereoscopic Graffiti Magic Pen, Drawing Toy, Birthday Gift for Girls

$21.80

Custom Insulated Steel Pipes from Factory - Heating Pipes for Residential Complexes, Spiral Insulated Pipes, Polyurethane Insulated Pipes

Custom Insulated Steel Pipes from Factory - Heating Pipes for Residential Complexes, Spiral Insulated Pipes, Polyurethane Insulated Pipes

$45.40