Skip to main content
Home / Screws / M3 M4 M5 M6 M8 304 Stainless Steel Countersunk Flat Head Cross Screw Nut Washer Kit, Extra-Long Combination Screws

Attributes

Brand -
Category Standard Parts, Components & Industrial Consumables / Screws
Origin -
Material 304 Stainless Steel
Head Style Countersunk Flat Head
Drive Type Cross (Phillips)
Available Sizes M3, M4, M5, M6, M8
Thread Length Extra-Long
Finish Polished Silver
Included Components Screws, Nuts, Washers
Corrosion Resistance High (Indoor/Outdoor Use)
Application Woodworking, Metal Assembly, DIY Projects
Package Type Organized Storage Box

6 reviews

A

Anonymous

Mar 20, 2026

Rating: 4/5

Great variety pack

Having all these sizes in one box is very convenient. The washers fit perfectly. I took off one star because the M8 count was slightly lower than expected, but overall a great value.

A

Anonymous

Mar 17, 2026

Rating: 5/5

High quality stainless steel

I used these for an outdoor fence repair. After several months of rain, there is absolutely no rust. The countersunk head sits flush every time.

A

Anonymous

Mar 13, 2026

Rating: 5/5

Perfect for my woodworking projects

The extra-long length was exactly what I needed for thick lumber. The stainless steel quality is top-notch and they drive in smoothly without stripping.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Excellent value for money

You get a huge quantity for the price. The 304 steel is genuine as tested with my magnet kit (slightly magnetic due to cold working, which is normal). Highly recommended.

A

Anonymous

Mar 10, 2026

Rating: 5/5

Essential for any toolkit

This kit saved me a trip to the hardware store multiple times already. The organization box is sturdy and keeps everything sorted by size.

A

Anonymous

Mar 04, 2026

Rating: 4/5

Good threads, sharp points

The threading is clean and consistent. They bite into wood easily. Just be careful with the sharp points when digging through the box.

5 FAQ

Q: Are these screws suitable for use in marine environments?

A: While 304 stainless steel offers excellent corrosion resistance for most outdoor applications, we recommend 316 stainless steel for direct, constant exposure to saltwater marine environments.

Q: Is the storage box stackable?

A: Yes, the included storage box features a interlocking lid design that allows multiple units to be stacked securely on top of each other.

Q: Can these be used with aluminum sheets without causing galvanic corrosion?

A: Stainless steel can cause galvanic corrosion when in direct contact with aluminum in the presence of an electrolyte. We suggest using a barrier washer or sealant if using them together in wet conditions.

Q: Does the kit come with a screwdriver bit?

A: No, this kit includes only the screws, nuts, and washers organized in a storage box. A Phillips head screwdriver or bit is not included.

Q: What is the exact length of the 'extra-long' M4 screws?

A: The extra-long M4 screws in this kit are 50mm in total length. Please refer to the detailed size chart in the product images for specific lengths of other sizes.

Explore your interests

All Categories
Best Seller (30)
New List (30)
Portable Invisible Aligner Case for Invisalign and Children's Orthodontic Retainers

Portable Invisible Aligner Case for Invisalign and Children's Orthodontic Retainers

$12.50

Paper Blending Stumps Set for Art Highlighting and Sketching, Professional Smudging Tools for Fine Arts Students

Paper Blending Stumps Set for Art Highlighting and Sketching, Professional Smudging Tools for Fine Arts Students

$2.65

Sketch Blending Stump and Knife Set - Art Supplies Including Paper Stumps, Makeup Sponges, Highlight Detail Tools, Charcoal Wipers, and Scraper Kit

Sketch Blending Stump and Knife Set - Art Supplies Including Paper Stumps, Makeup Sponges, Highlight Detail Tools, Charcoal Wipers, and Scraper Kit

$4.08

New Children's Potty Training Seat for Boys and Girls

New Children's Potty Training Seat for Boys and Girls

$28.00

FRP Spray Purification Tower for Thermal Power Plant Exhaust Gas Treatment - Desulfurization, Denitrification, Acid Mist Scrubber, FRP Chimney

FRP Spray Purification Tower for Thermal Power Plant Exhaust Gas Treatment - Desulfurization, Denitrification, Acid Mist Scrubber, FRP Chimney

$680.00

Handmade Natural Gourd Cute Smiley Face Rattle Baby Soothing Toy Safe for Chewing No Paint

Handmade Natural Gourd Cute Smiley Face Rattle Baby Soothing Toy Safe for Chewing No Paint

$32.30

Baby Wooden Rattle Toy - Chewable Traditional Goat Skin Shaker for Newborn Boys and Girls

Baby Wooden Rattle Toy - Chewable Traditional Goat Skin Shaker for Newborn Boys and Girls

$9.80

Yuanhengtong Whiteness Meter WSB-1/2Y/3Y/CY, Digital Whiteness Tester for Paper, Flour, Paint, Plastic, Ceramics, and Textiles

Yuanhengtong Whiteness Meter WSB-1/2Y/3Y/CY, Digital Whiteness Tester for Paper, Flour, Paint, Plastic, Ceramics, and Textiles

$1,055.80

G460 Fast-Drying Glue for Plastics Bonds PP PVC ABS PC PS Strong Low-Whitening Transparent Instant Adhesive

G460 Fast-Drying Glue for Plastics Bonds PP PVC ABS PC PS Strong Low-Whitening Transparent Instant Adhesive

$38.80

Children's Drawing Board Blackboard Whiteboard Accessories Colorful Whiteboard Markers Chalk Set Magnetic Stickers Toys Letters Numbers Eraser

Children's Drawing Board Blackboard Whiteboard Accessories Colorful Whiteboard Markers Chalk Set Magnetic Stickers Toys Letters Numbers Eraser

$3.00

Automatic Retractable Air Hose Reel - Pneumatic Hose Drum for Auto Repair, Detailing, and Water/Electric Applications

Automatic Retractable Air Hose Reel - Pneumatic Hose Drum for Auto Repair, Detailing, and Water/Electric Applications

$295.00

Sheepskin Rattle Traditional Handmade Baby Safe to Chew Brass Stick Bell Clapper Rattle Intangible Cultural Heritage Leather Newborn

Sheepskin Rattle Traditional Handmade Baby Safe to Chew Brass Stick Bell Clapper Rattle Intangible Cultural Heritage Leather Newborn

$16.00

Glass Reactor with Multi-Function Stirring and High-Temperature Resistance - Double-Layer Glass Reactor from Manufacturer, Customizable

Glass Reactor with Multi-Function Stirring and High-Temperature Resistance - Double-Layer Glass Reactor from Manufacturer, Customizable

$85.00

Charcoal Blending Stump Set for Sketching - Highlight, Shadow, and Detail Tools with Replaceable Sponge Tips for Artists

Charcoal Blending Stump Set for Sketching - Highlight, Shadow, and Detail Tools with Replaceable Sponge Tips for Artists

$4.80

Minimalist Stainless Steel Toothbrush Holder with Drainage - Ins Style Bathroom Organizer for Cosmetics

Minimalist Stainless Steel Toothbrush Holder with Drainage - Ins Style Bathroom Organizer for Cosmetics

$10.40

Qili Automotive Paint Degreasing Cloth – Glue/Dust Removal Paper, Industrial Wiping & Absorbent Paper

Qili Automotive Paint Degreasing Cloth – Glue/Dust Removal Paper, Industrial Wiping & Absorbent Paper

$313.12

Qingzhu Sketch Blending Cotton - Professional Sponge Balls & Paper Stumps for Art Students, Colorful Thick Absorbent Drawing Tools

Qingzhu Sketch Blending Cotton - Professional Sponge Balls & Paper Stumps for Art Students, Colorful Thick Absorbent Drawing Tools

$4.38

Electric Scooter Dashboard Cover for Aima Metaverse PLAY Instrument Panel Screen Protector Waterproof Case

Electric Scooter Dashboard Cover for Aima Metaverse PLAY Instrument Panel Screen Protector Waterproof Case

$13.50

Continental Tire 265/40R22 106V XL FR CSC5 SUV - Compatible with BYD Tang (Removed from Vehicle)

Continental Tire 265/40R22 106V XL FR CSC5 SUV - Compatible with BYD Tang (Removed from Vehicle)

$618.00

Yandi Retainer Storage Case for Kids - Lightweight Portable Box for Orthodontic Aligners and Dentures

Yandi Retainer Storage Case for Kids - Lightweight Portable Box for Orthodontic Aligners and Dentures

$8.42

Zhizhi Manshu Wen Zhengming Small Regular Script Collection of Twelve Ancient Texts: Yueyang Tower Record, Peach Blossom Spring Record, Farewell to Dongyang Ma Sheng Xu

Zhizhi Manshu Wen Zhengming Small Regular Script Collection of Twelve Ancient Texts: Yueyang Tower Record, Peach Blossom Spring Record, Farewell to Dongyang Ma Sheng Xu

$68.00

Factory Direct Rubber Molding Tools - Custom Production & Processing

Factory Direct Rubber Molding Tools - Custom Production & Processing

$2,280.00

Catalytic Combustion Waste Gas Treatment Equipment - RCO Activated Carbon Adsorption and Desorption Integrated Machine for Industrial Exhaust Processing

Catalytic Combustion Waste Gas Treatment Equipment - RCO Activated Carbon Adsorption and Desorption Integrated Machine for Industrial Exhaust Processing

$26,000.00

ASY Gravure Printing Machine for Plastic Film, 6-Color Flexographic Printer for Shopping Bags

ASY Gravure Printing Machine for Plastic Film, 6-Color Flexographic Printer for Shopping Bags

$86,400.00

Coil Refractory Cement for Medium-Frequency Furnace Repair - Fine High-Temperature Bonding Agent for Copper Coils (White/Red)

Coil Refractory Cement for Medium-Frequency Furnace Repair - Fine High-Temperature Bonding Agent for Copper Coils (White/Red)

$7,800.00

Over-Toilet Storage Rack - No-Drill Bathroom Organizer Shelf for Restrooms and Washrooms, Space-Saving Storage Solution

Over-Toilet Storage Rack - No-Drill Bathroom Organizer Shelf for Restrooms and Washrooms, Space-Saving Storage Solution

$8.90

NIU NXT Instrument Cover for FXT/FX Electric Scooters – Waterproof Protective Case and Modification Accessory

NIU NXT Instrument Cover for FXT/FX Electric Scooters – Waterproof Protective Case and Modification Accessory

$6.50

Anlin FK1 Cheyenne Tattoo Pen Silent Model All-in-One for Lining and Shading

Anlin FK1 Cheyenne Tattoo Pen Silent Model All-in-One for Lining and Shading

$221.25

[Osstem Dental Implants] Imported Dental Crowns and Bridges by Aizhier Oral Care for Partial Tooth Loss

[Osstem Dental Implants] Imported Dental Crowns and Bridges by Aizhier Oral Care for Partial Tooth Loss

$230.00

Heavy-Duty Multi-Layer Warehouse Shelving Unit for Storage, Retail, and Home Use

Heavy-Duty Multi-Layer Warehouse Shelving Unit for Storage, Retail, and Home Use

$252.00